tmerritt
691b2bc23c
The first _wip project to get a real disassembly. 4,165 instructions /
8,444 code bytes (25.8%), 24,324 data bytes, 0 unclassified -- every byte
of the 32 KB PRG is now classified as code or data.
The split needed three stages, all recorded in prg.s's header:
* nesdis.py --undocumented --auto-seed at base $8000 gave 3,272
instructions / 6,555 bytes. The undocumented opcodes matter here: the
trace stops dead at the first one it cannot decode.
* Four hand-seeded entries ($C08B, $DC1E, $E0D5, $E134). Each is a
branch target from decoded code that sat inside an untraced data run,
so the tracer never reached it.
* A merged four-session Mesen Code Data Logger capture (kept as
xevious_mesen.cdl) promoted 1,902 bytes from data to code and
demoted 22 the trace had called code.
Two tool bugs fell out and are fixed here:
* nesdis.py emitted the undocumented single-byte NOPs ($1A/$3A/$5A/
$7A/$DA/$FA) as `nop`, which ca65 assembles as the *official* $EA --
the rebuild stopped being byte-identical at $DF82. The check now
keys on the opcode byte, not just the addressing mode. All three
`make regen` pipelines (MUSCLE, Pyramid, Urban Champion) are
unaffected and still reproduce prg.s byte for byte.
* cdl_reclass.py left the original data-block header in place when the
CDL split that block, so the file ended up with two region headers
describing overlapping spans (20 of them here). The header is now
dropped with the block it describes; the promoted projects that use
the tool are byte-for-byte unchanged.
The project README has the power-on flow analysis. The most interesting
find is at $FC45: the reset path compares RAM $0100-$0107 against the
ASCII string "Kei Cros", and the copyright text at $FF1E reads
"MAIN: KEI CROSS. SOUND: UHOHOY OHNOGI." The OAM is at $0700, not
$0200 -- the NMI handler does LDA #$07 / STA $4014.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Add explicit `make wip` / `make wipclean` targets for the _wip tier
The root Makefile's all / clean / <MAPPER> targets deliberately name only
the promoted mapper folders, so nothing in them reaches into _wip/. Give
the pre-promotion tier its own opt-in targets instead of the manual
`for d in _wip/*/*/; do make -C "$d"; done` loop:
make wip # build + verify every _wip/<MAPPER>/<Project>/
make wipclean # clean the build artifacts in that tier
Both the Makefile and the four documents that describe the tier (README,
TODO, WIP, AGENTS) are updated together, so the tree stays consistent.
The same commit records Xevious (U) reaching Pass 2 in those documents:
all 487 labels named, every branch and call symbolic, zero Label_XXXX and
zero raw $XXXX operands left.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Update the _wip/ tier documentation; fix the make wip target and the mirroring bug
The WIP tier's four documents (WIP.md, README.md, TODO.md, AGENTS.md) had
drifted away from the tree. Every number in them was re-derived from the
ROMs and the folder layout rather than carried forward.
Counts and structure
- The tier holds 854 projects across 29 mapper folders, not "856 across
30". Xevious (U) and Zanac (U) were promoted on 2026-10-20 and their
_wip/ folders were left behind as residue -- "git mv" moves only the
tracked files, so the old folder survived with its build artifacts and a
stale README. Both are removed now; the promotion procedure documents
the step so it does not recur.
- _wip/MAPPER8/ holds a copy of the already-promoted Mermaids of
Atlantis (U) and is excluded from every count and table.
- Pass 0 skeletons: 852 (was 855). Xevious (U) left the tier, so the
two projects with a real disassembly are Golf (JU) and Volleyball (U).
- PRG sizes 2 / 150 / 42 / 522 / 127 / 10 / 1; 226 projects with no CHR;
38 keep the CPU-address linker layout; 37 are mapper 0.
- Every inventory row was re-checked against its ROM: PRG/CHR size,
mirroring, all three vectors, and the battery / four-screen / footer
notes. 854 of 854 rows now match.
Fixes
- The root Makefile used $(WIP) but never defined it, so "make wip" and
"make wipclean" expanded to "for m in /*/" -- they walked the
filesystem root instead of the tier. "WIP := _wip" is now defined, and
"make wip" builds and verifies the whole tier: 855 of 855 passed, 0
failures.
- make_skeleton.py masked header byte 6 with 0x03, so the battery bit
(bit 1) leaked into the mirroring value and 56 battery-backed ROMs'
READMEs claimed "Four-screen" while their own "Four-screen VRAM" row
said "no". The mask is now 0x01 and the 56 READMEs are corrected.
- Golf (JU)'s README still described the pre-flatten copilot/ folder and
the old PRG-only compare; it now describes the whole-ROM build.
- Pyramid (U)'s audit comments are canonical again, so Golf (JU) is the
only project in the tree still on the pre-canonical spelling.
New in WIP.md
- Byte 7's lower nybble is non-zero on 58 of the ROMs -- 55 carry the
literal "DiskDude!" watermark, two "DisNi0330", one "byKH+KEN". Only
the upper nybble carries mapper bits, so the noise is harmless.
- The twelve ROMs that set the four-screen bit, split by whether their
board actually supports four-screen VRAM.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Promote Volleyball (U) from _wip/NROM/ to NROM/
Volleyball (U) reached Pass 3 before promotion, so this is a promotion of a
finished disassembly rather than a Pass 0 skeleton.
The disassembly
- 11,395 instructions / 23,926 code bytes (73.0 % of the PRG image),
8,842 data bytes, 0 unclassified.
- The split needed the game-state dispatch table at $85E1 declared to the
tracer (--table 85E1:11) -- without it only 66 % of the image traced --
plus a Mesen Code Data Logger capture taken while a random-input bot
played the attract demo, which promoted 1,757 bytes from data to code.
- Pass 2 named all 1,989 labels: 730 read out of the code by hand, 1,221
internal branch targets derived mechanically. Zero Label_XXXX, zero raw
$XXXX call or branch operands, zero SubC residue.
- Pass 3 named the zero page, the $0500 ball structure and all 37 data
blocks. apply_symbols.py --report: 0 pending substitutions, 0
multi-alias residue. align_audit_comments.py: no column drift.
- cdl_check.py cross-checks the finished prg.s against the capture: 0
CDL-code bytes not covered by an instruction, 0 CDL-data bytes that
start one.
- 29 neutral ZpXX zero-page slots remain, each with its reason recorded
in locals.inc, as the promotion rules allow.
The promotion
- git mv "_wip/NROM/Volleyball (U)" "NROM/Volleyball (U)". Mapper 0, so
it lands in NROM/. The whole-ROM build was already in place, so there
was no build surgery; the project builds byte-identically at its new
home and the old folder is gone (git mv moves the untracked build
artifacts too, so no residue was left behind).
- Root README.md: new inventory row 39 and a per-project detail section,
plus the WIP-tier counts. The detail sections for Xevious (U) and
Zanac (U) were numbered one too high against the inventory rows and
are now aligned; a leftover editing note in the same place is gone.
- WIP.md: the Volleyball row leaves the inventory, and the tier is now
853 projects across 29 mapper folders (36 in _wip/NROM/), 852 of them
Pass 0 skeletons. Golf (JU) is the only project left in the tier with
a real disassembly.
- TODO.md and AGENTS.md: the same counts, and the promoted tier is now
40 projects (39 under NROM/).
Verified: make wip builds and verifies the whole tier (854 of 854 passed,
0 failures) and make builds the promoted tier (39 of 39 passed).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Rename NROM/Pyramid (U) to NROM/Pyramid (U) (Sachen)
The promoted inventory row had read "Pyramid (U) (Sachen)" since the
project was promoted on 2026-10-20, but the folder was named "Pyramid (U)" --
so the row pointed at a folder that did not exist. The folder now matches
the row, and the project's own README title, its ROM file name
("Pyramid (U) (Sachen).nes") and the parenthetical convention the rest of
the promoted tier already uses (Popeye (JU) (PRG 0/1), Raid on Bungeling
Bay (U) [a2], Pac-Man (Tengen) (U)).
What changed inside the project
- The Makefile's regen target passes --project "Pyramid (U) (Sachen)", so
the tracer writes the matching header line. prg.s and locals.inc were
updated to that header line and nothing else -- the disassembly is
byte-identical to before.
- make regen still reproduces prg.s and locals.inc byte for byte.
- The project's README's build-verification line now names the new folder.
References updated: the root README.md (inventory prose, the row-33 detail
section, the build-status table, and the notable-observations bullet),
TODO.md (the promoted-projects table and the Pyramid notes) and AGENTS.md
(the recently-promoted list and the unlicensed-titles quirk).
Verified: make builds the promoted tier (39 of 39 passed) and the project
rebuilds byte-identically at its new path.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Rebuild Mermaids of Atlantis (U): bank-aware Pass 1, Pass 2/3 names
The promoted project did not build: a Pass 2 rename had been applied
half-way, leaving eight undefined symbols and two jumps that pointed at
the wrong routine, while the root README already claimed the project was
byte identical. The _wip copy still built, because it held the un-renamed
Pass 1 source.
The disassembly is now derived from the ROM itself, with the Mesen Code
Data Logger as the oracle for the code/data split:
* _tools/banked_dis.py traces every MMC3 bank separately, each with the CPU
window it is visible at, seeded from a CDL capture so the code a static
trace cannot reach is disassembled too. The CDL is the authority: a
decode the CPU never fetched is dropped, and so is the fall-through
behind a call whose target never returns (the game's dispatchers have
their jump table right behind the call).
* One segment per bank (PRG0..PRG7) with its own .org, so the assembler
knows the CPU address of every label while the linker still writes the
bytes to the bank's file offset. A flat segment cannot do both: a call
would encode the file offset instead of the CPU address.
* Pass 2 names every label - 494 routines, no Label_XXXX and no raw
$XXXX branch or jump operand left. Pass 3 applies 13 semantic zero-page
aliases and writes the routine headers.
* 8,075 bytes of code (12.3% of the 64 KB PRG), up from 200 bytes.
The banking turned out to be unusual and is documented: the fixed bank is
the fourth 8 KB bank (file $6000-$7FFF), not the last one, and the image
carries the reset stub and the vector table twice. The live NMI vector
is $808F - the frame handler - while the copy at the end of the image
names $8189, which is a BRK in the first half. The game's text table
lives at CPU $F1D6, which is the fixed window, and that is what settles
the question.
Also: the leftover _wip/MAPPER8 folder is removed, as it is for every
other promotion.
The project builds byte identical:
Byte-identical ROM verified.
Add CHANGELOG.md: the pass history of every project
A project goes through four milestones - Pass 1 (the code/data split),
Pass 2 (the labels replaced by names), Pass 3 (the semantic naming) and
Promotion (the move into the top-level mapper folder) - and the history
of those milestones was scattered over the commit log, the project
READMEs and the root README.
CHANGELOG.md gathers it: one section per project with a row for each
milestone, the date, and a sentence saying what the milestone produced.
The numbers are the ones the project README and the root README already
carry - instruction count, code coverage, named labels, semantic
zero-page aliases, named data tables - so a reader can see at a glance
which projects are done and which are not. Golf (JU), the only project
still in _wip/ with a real disassembly, is listed with its open
milestones, and the other 852 _wip/ projects are covered as a tier.
The requirement is now part of the workflow contract: PROMPTS.md gains a
"Pass 3: Changelog entry" section and a ninth checklist item, and
AGENTS.md points at the file. A milestone and its changelog row go in
the same commit, so the changelog and the source never disagree.
Balloon Fight (JU): repair the audit trail and complete the routine headers
The per-instruction audit trail was stale by two bytes from
ResetInitializationData ($C085) onward. 5,944 of the 6,007 comments named
the wrong CPU address and PRG offset, because the three-byte .byte "HAL"
signature at $C082-$C084 had been counted as one byte when the trail was
first generated - the routine headers and the linker labels were right all
along, so the source and its own headers disagreed with each other. The
trail was rebuilt from the ca65 -l listing with
_tools/repair_audit_comments.py, and every rewritten comment was re-checked
against prg.bin. The comments were also moved into the canonical column-35
field: they had sat two spaces after the mnemonic, with no column discipline
at all, unlike every other promoted project.
All 63 routine headers now carry a ; Clobbers: block, so the headers carry
the full template AGENTS.md describes. The blocks are derived, not written by
hand. The new _tools/derive_clobbers.py takes the opcode from the audit
comment's byte list, so the addressing mode is exact and a data directive is
never mistaken for an instruction; it resolves the operand through
locals.inc and symbols.inc to name what is written; it follows the real
control flow, so a jsr to another named entry is a call (the callee's
clobbers count) while a branch or a fall-through is not; and it models
register preservation, so NmiHandler reports *no register* - it saves and
restores A, X and Y around the frame - and FlushPpuCommandPreserved reports
only A, because X and Y come back unchanged.
Two tools changed. derive_clobbers.py is new. align_audit_comments.py had
an off-by-one: it tested the indented code length against 31 instead of
against 35, so code texts of 28-31 characters were never padded into the
column.
The change is comments only. The code text of all 8,538 lines is unchanged,
make still prints "Byte-identical ROM verified.", the 6,007 audit comments
still re-check against prg.bin, all 63 routine headers agree with the
instructions they describe, and every label agrees with reconstructed.lbl.
ReflectObjectYVelocity and UpdateSpecialObjectSystem moved out of locals.inc
and became labels in prg.s at their real addresses.
CHANGELOG.md becomes the repository's running log: a Pending list of the
changes to be put in the next commit, a History of the commits already made,
and the per-project milestone index at the end. The next commit's message is
written from the Pending entries, so the two cannot drift apart. PROMPTS.md
and AGENTS.md describe the new shape. WIP.md drops the _wip/MAPPER8/ note:
the folder held a copy of Mermaids of Atlantis (U) that had already been
promoted.
World Class Track Meet (U): Pass 1, the code/data split
Pass 1 is done. The split is 8,400 instructions / 18,028 code bytes (55.0 %)
of the 32 KB PRG, with 884 routine entries, 55 data blocks and 102 zero-page
aliases. The PRG is CNROM (mapper 3) and maps whole at $8000-$FFFF, so the
linker moved the PRG segment from a .nes file offset to $8000 and the build
still compares byte identical.
Four dispatch tables had to be seeded by hand. The event table at $F796 (5
entries) is read at $F780 and jumped to through `jmp ($001F)`. The three
push-pointer tables - $BFC4 (16 entries), $BFE4 (2) and $E5F2 (7) - push a
handler address and `rts` into it, and the 6502's `rts` adds one to the
address it pops, so each table stores the entry address minus one; the seeds
are the table values plus one. The tracer runs with --undocumented: the code
uses undocumented NMOS opcodes as ordinary code (ANC $37 at $BFF8, and the
RRA/RLA/SLO and NOP forms elsewhere). Seeding the tables takes the coverage
from 27.8 % to 55.0 %.
$C0BE-$C0C5 is forced back to data: the IRQ vector $C0C0 points into the
middle of the `jmp $C047` at $C0BE, and the game never executes CLI, so the
vector is dead. `make pass1` regenerates prg.s and locals.inc from prg.bin
and reproduces the committed prg.s byte for byte.
The project README records the split, the four dispatch tables, the dead IRQ
vector, the wrong CHR size field in the header, and what is still data. The
milestone index in CHANGELOG.md gains the project; WIP.md, README.md and
AGENTS.md follow the tier counts and the layout.
nesdis.py gains a --mapping-note option, so the header's "PRG mapped at" line
can describe a board that is not NROM - CNROM's whole 32 KB at $8000-$FFFF is
not "mirrored to the upper half".
Replaces runs of $00 and $FF with .res <run>, <byte>
Golf (JU) and World Class Track Meet (U): Pass 2/3 complete, promoted from _wip/
- World Class Track Meet (U) - Pass 2 complete: all 884 Label_<addr>
definitions replaced (651 semantic routine names + 233 Sub_<addr>), all 731
raw $XXXX jsr/jmp call operands resolved to symbolic labels, all branch
targets given role-based names; routinemap.tsv added; make stays
byte-identical.
- World Class Track Meet (U) - Pass 3 complete: 24 semantic zero-page
aliases applied via apply_symbols.py (0 residue), 78 neutral ZpXX slots
documented with reasons in locals.inc, all hardware-register operands use
symbols.inc names, project README rewritten with Pass 2/Pass 3 sections and
data-table inventory; promoted out of _wip/CNROM/.
- World Class Track Meet (U) - project README documents the five event-table
entries at $F796 and marks the olympics mode as not yet proven.
- Golf (JU) - audit comments converted from pre-canonical (; C000: A9 00)
to the canonical ; CPU:$C000 PRG:0000 A9 00 form at column 35; 4,156
comments re-aligned, comment/whitespace only, whole-ROM build stays
byte-identical.
- Golf (JU) - 339 internal branch-target Label_ labels given role-based names
via _tools/derive_branch_names.py; 0 raw $XXXX branch/jump operands remain.
- Golf (JU) - 275 zero-page operands substituted with locals.inc aliases via
apply_symbols.py; 0 residue; promoted out of _wip/NROM/.
- Xevious (U) - runs of $FF padding replaced with .res <count>, $FF in prg.s;
whole-ROM build stays byte-identical.
- Both projects promoted via git mv; leftover _wip/ folders removed; root
README.md inventory rows added; WIP.md rows removed.
World Class Track Meet (U): apply zero-page symbol substitutions
Run apply_symbols.py to substitute ZpXX zero-page operands with
semantic locals.inc aliases (SlotState, GameMode, etc.) at proven
sites; 0 residue, whole-ROM build stays byte-identical.
Xevious (U): re-split Pass 1 from the Mesen CDL and decode the data tables
- Xevious (U) - Pass 1 re-split from the Mesen CDL (xevious_mesen.cdl) with
_tools/cdl_reclass.py: 1,158 bytes data->code, 48 code->data, 42 labels
emitted and 3 branch targets labelled; code 11,321->12,455 bytes
(34.5%->38.0%), instructions 5,513->6,002. The 45 recovered entry points
are named Sub_XXXX, so no Label_XXXX remains; six CDL-silent raw call
operands are documented as residue.
- Xevious (U) - the 4,448-byte block at $A74B-$B8AA is split into six proven
tables: VramWritePtrTable (15 pointers), VramWriteData, DataStreamPtrTable
(16), ObjTilePtrTable (99), ObjTileData and DataStreamData. The $D833
pointer table is corrected to base $D833 (4 entries; the old ObjCodePtrTable
at $D834 was one byte late). $F957-$FAF5 is split into ObjSpeedTable,
ObjSpeedTable2, SpriteLayoutPtrTable (19) and SpriteLayoutData;
$FEE6-$FF1C into PaletteData and OamAttrTable. $F5D8 is decoded as
TextTileData (font tile indices: PLAYER, GAME OVER, READY, SOLVALOU, LEFT,
PAUSE); $F53C becomes AttrAddrTable, $F89E HandlerPtrTable and $EF3B
SpriteLayoutData2. Project README rewritten with the corrected stats, a
32-entry table inventory and the Pass 1 residue.
- _tools/cdl_reclass.py - preserve the data label(s) between a data-block
header and its first .byte row when the block stays data; the $DF78 split
dropped Data_DF78 and the rebuild failed with an undefined symbol.
- _tools/resolve_raw_branches.py - handle negative relative offsets
(beq *-$0B); the pattern only matched *+$NN and *$NN.
Docs: refresh the tier counts to 41 promoted / 851 _wip, add the WCTM row
- Docs - tier counts refreshed to the post-promotion state across AGENTS.md,
root README.md, WIP.md, TODO.md and CHANGELOG.md: 41 promoted projects
(38 under NROM/, plus CNROM/World Class Track Meet (U), UNROM/Zanac (U) and
MAPPER8/Mermaids of Atlantis (U)) and 851 _wip/ projects, every one of them
a Pass 0 skeleton. The stale "39/40 promoted", "853 _wip", "Golf (JU) is
still in _wip/" and "Golf is the last pre-canonical project" statements are
corrected.
- Root README.md - the promoted inventory gained the missing World Class Track
Meet (U) row (row 41, mapper 3, 32 KB PRG / 32 KB CHR), and the "All 38 are
mapper 0 / 16 KB PRG" sentence is replaced with the actual split (36 of the
41 rows are mapper 0 / 16 KB; Xevious and Volleyball are 32 KB, World Class
Track Meet is mapper 3, Zanac mapper 2 and Mermaids mapper 8).
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# Disassembly Project 1
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This is a set of disassembled NES roms using AI to translate.
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# This is not for distribution.
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# This is not for you.
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> **Layout changed 2026-10-20:** projects moved into **mapper directories**
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> (`NROM/`, `AOROM/`, `CNROM/`, `MMC1/`, `MMC3/`, `MMC5/`, `UNROM/`), project
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> folders were **flattened** (the old `copilot/` subfolder is gone — everything
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> sits directly in the project folder), every project's `OVERVIEW.md` became its
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> `README.md`, and a root `Makefile` now builds and verifies all projects at once
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> (`make`, `make clean`, `make <MAPPER>`); the git pre-commit hook drives it.
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> Older docs, commit messages and paths in this file's per-project notes may
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> still reference the previous layout — mentally strip the `copilot/` prefix.
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# Disassembly Project Index — /home/tmerritt/Projects/disasm/
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This document provides a consolidated overview of the **promoted** NES disassembly projects in the repository. Projects are organized **by mapper** into a folder per project under `NROM/`, `AOROM/`, `CNROM/`, `MMC1/`, `MMC3/`, `MMC5/`, `UNROM/` or `MAPPER8/` — 38 of the 41 promoted projects are mapper 0 and live in `NROM/`, with `World Class Track Meet (U)` in `CNROM/` (mapper 3), `Zanac (U)` in `UNROM/` (mapper 2) and `Mermaids of Atlantis (U)` in `MAPPER8/` (mapper 8). The pre-promotion tier mirrors the structure under `_wip/<MAPPER>/<Project>/` and is documented separately in **`WIP.md`** (851 projects across 29 mapper folders). Each project folder is **flat**: the source (`prg.s`, plus `header.s`/`chr.s` where present), the build config (`linker.cfg`, `symbols.inc`, `locals.inc`, `Makefile`) and the ROM splits all sit directly in the folder. Each project carries its own `README.md` (the file was called `OVERVIEW.md` before 2026-10-20) with a detailed power-on execution flow analysis. The pass history of every project — Pass 1, Pass 2, Pass 3 and Promotion, with the date and what each milestone produced — is in **`CHANGELOG.md`**.
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---
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## Project Inventory
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**Mirroring** is the iNES *arrangement* value taken from header byte 6, bit 0 (`0` = Horizontal, `1` = Vertical), the convention `AGENTS.md` fixes. Several per-project README files (then named `OVERVIEW.md`) previously carried the opposite *mirroring-direction* wording; all were normalized to this column on 2026-10-19.
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| # | Project | Region/Version | PRG Size | CHR Size | Mirroring | Build Status | Vectors (NMI / RESET / IRQ) |
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|---|---------|----------------|----------|----------|-----------|--------------|------------------------------|
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| 1 | Balloon Fight (JU) | Japan | 16 KB | 8 KB | Horizontal | BYTE-IDENTICAL (Pass complete) | $C094 / $C000 / $C0F7 |
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| 2 | Baseball (UE) | USA/Europe | 16 KB | 8 KB | Horizontal | BYTE-IDENTICAL (Pass complete) | $C046 / $C40B / $C43E |
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| 3 | Bomberman (U) | USA | 16 KB | 8 KB | Vertical | BYTE-IDENTICAL (Pass complete) | $C01A / $C000 / $FFF9 |
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| 4 | Burger Time (U) | USA | 16 KB | 8 KB | Horizontal | BYTE-IDENTICAL (Pass complete) | $FF7F / $FD24 / $FD24 |
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| 5 | Clu Clu Land (JU) | Japan | 16 KB | 8 KB | Horizontal | BYTE-IDENTICAL (Pass complete) | $C1F1 / $C196 / $C196 |
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| 6 | Defender 2 (U) | USA | 16 KB | 8 KB | Vertical | BYTE-IDENTICAL (Pass complete) | $CAA1 / $C983 / $CA9E |
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| 7 | Excitebike (JU) | Japan | 16 KB | 8 KB | Vertical | BYTE-IDENTICAL (Pass complete) | $C23B / $C184 / $FFF0 |
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| 8 | Tennis (JU) | Japan | 16 KB | 8 KB | Vertical | BYTE-IDENTICAL (Pass complete) | $C07D / $C000 / $C000 |
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| 9 | Pac-Man (USA) (Namco) | — | 16 KB | 8 KB | Horizontal | BYTE-IDENTICAL (Pass complete) | $C10E / $C033 / $C17E |
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| 10 | Donkey Kong 3 (JUE) | Japan / USA / Europe | 16 KB | 8 KB | Vertical | BYTE-IDENTICAL (Pass complete) | $C08D / $C000 / $C000 |
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| 11 | Donkey Kong Jr. (JU) | Japan | 16 KB | 8 KB | Vertical | BYTE-IDENTICAL (Pass complete) | $C6E6 / $C66E / $FFF0 |
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| 12 | CIRCUS | — | 16 KB | 8 KB | Vertical | BYTE-IDENTICAL (Pass complete) | $C05A / $C000 / $4CB7 |
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| 13 | Wild Gunman (U) | USA | 16 KB | 8 KB | Vertical | BYTE-IDENTICAL (Pass 3 complete, 49.3% code) | $C086 / $C000 / $C000 |
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| 14 | Joypad Test Cartridge (U) | USA | 16 KB | 8 KB | Vertical | BYTE-IDENTICAL (Pass 3 complete) | $CCF7 / $C000 / $C000 |
|
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| 15 | NES PowerPad Test Card (U) | USA | 16 KB | 8 KB | Vertical | BYTE-IDENTICAL (Pass complete) | $E06E / $E000 / $E000 |
|
||
| 16 | MUSCLE (U) | USA | 16 KB | 8 KB | Vertical | BYTE-IDENTICAL (Pass complete) | $86CB / $8000 / $8764 |
|
||
| 17 | Lunar Pool (U) | USA | 16 KB | 8 KB | Vertical | BYTE-IDENTICAL (Pass 2 complete, Pass 3 tables named) | $FF65 / $E80C / $FF64 |
|
||
| 18 | Donkey Kong (JU) | Japan | 16 KB | 8 KB | Horizontal | BYTE-IDENTICAL (Pass 2/3 complete, 76.3% code) | $C85F / $C79E / $FFF0 |
|
||
| 19 | Donkey Kong Jr. Math (U) | USA | 16 KB | 8 KB | Vertical | BYTE-IDENTICAL (Pass 3 complete) | $C4A9 / $C41E / $FFF0 |
|
||
| 20 | Duck Hunt (JUE) | Japan / USA / Europe | 16 KB | 8 KB | Vertical | BYTE-IDENTICAL (Pass 3 complete) | $C086 / $C000 / $C000 |
|
||
| 21 | Ice Climber (JE) | — | 16 KB | 8 KB | Horizontal | BYTE-IDENTICAL (Pass 3 complete) | $C076 / $C014 / $FFF0 |
|
||
| 22 | Ice Climber (U) | USA | 16 KB | 8 KB | Horizontal | BYTE-IDENTICAL (Pass 3 complete) | $C076 / $C014 / $FFF0 |
|
||
| 23 | Lode Runner (U) | USA | 16 KB | 8 KB | Vertical | BYTE-IDENTICAL (Pass 2/3 complete) | $C02C / $C000 / $FFF9 |
|
||
| 24 | Pinball (JU) | Japan | 16 KB | 8 KB | Horizontal | BYTE-IDENTICAL (Pass 2/3 complete) | $C1ED / $C000 / $C1ED |
|
||
| 25 | Millipede (U) | USA | 16 KB | 8 KB | Vertical | BYTE-IDENTICAL (Pass 2/3 complete, 74.6% code) | $C7F1 / $C735 / $FFF0 |
|
||
| 26 | Popeye (JU) (PRG 0) | — | 16 KB | 8 KB | Vertical | BYTE-IDENTICAL (Pass 2/3 complete, 72.3% code) | $C701 / $C649 / $FFF0 |
|
||
| 27 | Popeye (JU) (PRG 1) | — | 16 KB | 8 KB | Horizontal | BYTE-IDENTICAL (Pass 2/3 complete, 72.3% code; promoted from `_wip` 2026-10-20) | $C701 / $C649 / $FFF0 |
|
||
| 28 | Golf (JU) | Japan | 16 KB | 8 KB | Vertical | BYTE-IDENTICAL (Pass 1+2+3 complete; promoted from `_wip` 2026-10-21) | $C0A6 / $C000 / $C0C4 |
|
||
| 29 | Hogan's Alley (JU) | Japan | 16 KB | 8 KB | Vertical | BYTE-IDENTICAL (Pass 2 complete, Pass 3 partial, 49.1% code; promoted 2026-10-20) | $C088 / $C000 / $C000 |
|
||
| 30 | Mario Bros (JU) | Japan | 16 KB | 8 KB | Vertical | BYTE-IDENTICAL (Pass 2 complete, Pass 3 partial, 78.4% code; promoted 2026-10-20) | $C07D / $C000 / $C000 |
|
||
| 31 | Pac-Man (Tengen) (U) | USA | 16 KB | 8 KB | Horizontal | BYTE-IDENTICAL (Pass 2 complete, Pass 3 partial, 20.0% code; promoted 2026-10-20) | $C0FA / $C033 / $C16A |
|
||
| 32 | Pac-Man (U) | USA | 16 KB | 8 KB | Horizontal | BYTE-IDENTICAL (Pass 2 complete, Pass 3 partial, 19.6% code; promoted 2026-10-20) | $C0FA / $FF00 / $C16A |
|
||
| 33 | Pyramid (U) (Sachen) | — | 16 KB | 8 KB | Vertical | BYTE-IDENTICAL (Pass 2 complete, Pass 3 partial, 39.6% code; promoted 2026-10-20) | $D72E / $FF00 / $FF00 |
|
||
| 34 | Raid on Bungeling Bay (U) | USA | 16 KB | 8 KB | Vertical | BYTE-IDENTICAL (Pass 2/3 partial, 64.6% code; promoted 2026-10-20) | $C04C / $C000 / $C2C0 |
|
||
| 35 | Raid on Bungeling Bay (U) [a2] | — | 16 KB | 8 KB | Horizontal | BYTE-IDENTICAL (Pass 2 complete, Pass 3 partial, 64.3% code; promoted 2026-10-20) | $C04C / $C000 / $C2C0 |
|
||
| 36 | Urban Champion (JU) | Japan | 16 KB | 8 KB | Vertical | BYTE-IDENTICAL (Pass 3 complete, 33.9% code) | $CA91 / $CA00 / $CA00 |
|
||
| 37 | Xevious (U) | USA | 32 KB | 8 KB | Horizontal | BYTE-IDENTICAL (Pass 3 complete, 38.0% code) | $FC4E / $FAF6 / $FF1D |
|
||
| 38 | Zanac (U) | USA | 128 KB | none | Horizontal | BYTE-IDENTICAL (Pass 3 complete, 34.5% code) | $CE8D / $E7BF / $CEC4 |
|
||
| 39 | Volleyball (U) | Japan | 32 KB | 8 KB | Vertical | BYTE-IDENTICAL (Pass 3 complete, 73.0% code; promoted 2026-10-21) | $8053 / $8000 / $FFFF |
|
||
| 40 | Mermaids of Atlantis (U) | USA | 64 KB | 64 KB | Vertical | BYTE-IDENTICAL (Pass 3 complete, 12.3% code; promoted 2026-10-20, rebuilt 2026-10-21) | $808F / $FF00 / $8036 |
|
||
| 41 | World Class Track Meet (U) | USA | 32 KB | 32 KB | Horizontal | BYTE-IDENTICAL (Pass 1+2+3 complete, 55.0% code; promoted from `_wip` 2026-10-21) | $F803 / $F6FD / $C0C0 (dead) |
|
||
|
||
Thirty-six of the 41 rows are mapper 0 with a 16 KB PRG, 8 KB CHR and no trainer.
|
||
The exceptions: `Xevious (U)` and `Volleyball (U)` are mapper 0 with a 32 KB PRG;
|
||
`World Class Track Meet (U)` is mapper 3 (CNROM) with a 32 KB PRG and 32 KB CHR
|
||
(its header's CHR-size field overstates the CHR by 32 KB); `Zanac (U)` is mapper 2
|
||
with a 128 KB PRG and no CHR; `Mermaids of Atlantis (U)` is mapper 8 with a 64 KB
|
||
PRG, 64 KB CHR and eight 8 KB banks.
|
||
|
||
All 41 rows are promoted and **BYTE-IDENTICAL** — `make` compares the whole
|
||
reconstructed ROM against `rom.nes` in the project folder. The last two to leave
|
||
`_wip/` were `Golf (JU)` (row 28) and `World Class Track Meet (U)` (row 41), both
|
||
promoted on 2026-10-21. (Urban Champion, row 36, kept its tail number, so the
|
||
promoted numbering is no longer a single contiguous range.)
|
||
|
||
> **Still true after the 2026-10-20 reorganization.** The mapper reorganization moved
|
||
> `Donkey Kong Jr. Math (U)` (row 19) into `_wip/NROM/` — it was fixed the same day (its four
|
||
> `jsr $F218` call sites had been labelled `SubCF218_Block` = $F1DC; repointed to
|
||
> the true entry `SubCF218`) and promoted back into `NROM/`. **Popeye (JU) (PRG 1)**
|
||
> was promoted from `_wip/NROM/` the same day (row 27) — its whole-ROM compare passes
|
||
> on the first build. `Excitebike (JU)` (row 7) — the repo's one open block after
|
||
> being returned to `NROM/` with a broken mid-repair build (duplicate symbol) —
|
||
> was finished the same day: the byte-596 mismatch (`$0A` operands where the ROM
|
||
> uses `$11`, now aliased `NmiMaskShadow`) is fixed, the 4,401 damaged audit
|
||
> comments were re-anchored via `_tools/repair_audit_comments.py`, and 58 raw
|
||
> `jsr/jmp $XXXX` operands were substituted with labels/equates. **All 38
|
||
> projects under `NROM/` now verify byte-identical.**
|
||
|
||
**How to read this table.** The vectors are the three little-endian words at the **end of the
|
||
16 KB PRG** (`$FFFA-$FFFF` in the `$C000` mirror) — *not* fields in the iNES header, whose bytes
|
||
0-9 carry only sizes, mirroring and mapper. Regenerate the whole column with:
|
||
|
||
```bash
|
||
python3 - <<'EOF'
|
||
import os
|
||
MAPPERS = ('NROM', 'AOROM', 'CNROM', 'MMC1', 'MMC3', 'MMC5', 'UNROM')
|
||
for base in MAPPERS:
|
||
if not os.path.isdir(base):
|
||
continue
|
||
for p in sorted(d for d in os.listdir(base) if os.path.isdir(os.path.join(base, d))):
|
||
rom = open(f"{base}/{p}/rom.nes", 'rb').read()
|
||
prg = rom[16:16 + rom[4]*16384]; vo = len(prg) - 6
|
||
v = [prg[vo+i] | (prg[vo+i+1] << 8) for i in (0, 2, 4)]
|
||
print(f"{p:30s} {'Vertical' if rom[6] & 1 else 'Horizontal':10s} "
|
||
+ " / ".join("$%04X" % x for x in v))
|
||
EOF
|
||
```
|
||
|
||
Five rows were wrong before this pass, all from copy-paste duplication of a neighbouring row's
|
||
vectors, and are corrected above:
|
||
|
||
| Project | Was | Actually |
|
||
|---------|-----|----------|
|
||
| Burger Time (U) | `$C046 / $C40B / $C43E` (Baseball's) | `$FF7F / $FD24 / $FD24` |
|
||
| Clu Clu Land (JU) | `$C1F1 / $C000 / $FFF9` | `$C1F1 / $C196 / $C196` |
|
||
| Excitebike (JU) | `$C1F1 / $FD24 / $FD24` | `$C23B / $C184 / $FFF0` |
|
||
| Pac-Man (USA) (Namco) | `$C10E / $C000 / $C17E` | `$C10E / $C033 / $C17E` |
|
||
| Donkey Kong 3 (JUE) | `$C07D / $C000 / $C000` | `$C08D / $C000 / $C000` |
|
||
|
||
Donkey Kong Jr.'s mirroring was also wrong (Horizontal, actually Vertical). Odd vector *targets*
|
||
are not mistakes: Burger Time's `$FF7F` NMI and CIRCUS's `$4CB7` IRQ point into unused/data space,
|
||
which is common in this set — see "Notes" under Per-Project Details.
|
||
|
||
Region/Version comes from the folder-name suffix (JU/U/UE/JUE); these mapper-0 headers do not
|
||
encode region, so CIRCUS — whose folder carries no suffix — is left as `—` rather than guessed.
|
||
|
||
---
|
||
|
||
## Per-Project Details
|
||
|
||
### 1. Balloon Fight (JU)
|
||
- **Folder:** `NROM/Balloon Fight (JU)/`
|
||
- **ROM:** `balloon.nes` (24,592 bytes)
|
||
- **Source:** `prg.s` (8,543 lines)
|
||
- **Linker:** PRG at $C000, 16 KB; single segment
|
||
- **Vectors:** NMI → $C094 (`NmiHandler`), RESET → $C000 (`Reset`), IRQ → $C0F7 (`IrqHandler`, self-loop)
|
||
- **Key subsystems:** NMI-driven frame loop with PPU command buffer, round spawner ($C790), bonus objects ($CB74), carrier/rescue sequence ($C6F9), particle system ($CDAA), sound driver ($FFF7 banked)
|
||
- **Build fix:** None needed; byte-identical out of the box. **Pass 1 verified complete 2026-10-16** — 5,303 instructions / 11,260 code bytes (68.7%), which is *more* than the complete-opcode static tracer finds (5,277 / 11,202); the 166 tracer-only bytes are genuine data (command scripts at $D437/$D45A, the $C3B5 pointer table, the arithmetic table at $FBCA), not missed code. The last two `.incbin` spans were converted to explicit classified bytes (`TrailingFillBeforeApuTables` at $F4C5, `SoundEngineTailBytes` at $F5FC), so no ROM byte is hidden
|
||
- **Pass 3 symbols (2026-10-19):** every operand `symbols.inc`/`locals.inc` defines is now
|
||
named in `prg.s` — **125** hardware-register operands and **797 of 813** zero-page/RAM
|
||
operands. The 15 multi-alias addresses were resolved per routine (`--sites` in
|
||
`_tools/apply_symbols.py`). **16** operands are left numeric: `$13` used as a plain
|
||
high-byte scratch beside `Temp12`, where none of its three aliases fits. Rebuild stays
|
||
byte-identical.
|
||
- **Audit-trail repair (2026-10-21):** the per-instruction audit comments were **stale by
|
||
two bytes** from `ResetInitializationData` ($C085) onward — 5,944 of the 6,007 comments
|
||
named the wrong CPU address/PRG offset, because the 3-byte `.byte "HAL"` signature at
|
||
$C082–$C084 was counted as one byte when the trail was generated. The routine headers
|
||
and the linker labels were correct, so source and headers disagreed.
|
||
`_tools/repair_audit_comments.py` rebuilt the trail from the `ca65 -l` listing
|
||
(validated against `prg.bin`) and `_tools/align_audit_comments.py` restored the
|
||
canonical column-35 layout. Comment-and-whitespace only: the code text of all 8,544
|
||
lines is unchanged and `make` still prints **Byte-identical ROM verified.** All 6,007
|
||
comments now re-check against `prg.bin`, all 65 routine headers agree with the
|
||
instructions they describe, and every label agrees with `reconstructed.lbl`. A
|
||
related off-by-one in `align_audit_comments.py` was fixed (it tested the indented code
|
||
length against 31 instead of 35, so 28–31-character code texts were never padded into
|
||
the column).
|
||
- **Routine headers completed (2026-10-21):** all **63** routine headers now carry the
|
||
full template `AGENTS.md` describes — global, local, parameters, returns and
|
||
**clobbers**. The `; Clobbers:` blocks are derived, not written by hand:
|
||
`_tools/derive_clobbers.py` takes the opcode from the audit comment's byte list (so
|
||
the addressing mode is exact), resolves the operand through `locals.inc`/`symbols.inc`
|
||
to name what is written, follows the real control flow (a `jsr` to another named entry
|
||
is a call; a branch or a fall-through is not), and models register preservation — so
|
||
`NmiHandler` reports *no register* (it saves and restores A, X and Y) and
|
||
`FlushPpuCommandPreserved` reports only A (X and Y come back unchanged). The flags are
|
||
named individually. Comment-only change: the code text of all 8,538 lines is unchanged
|
||
and `make` still prints **Byte-identical ROM verified.**
|
||
- **Details:** `Balloon Fight (JU)/README.md`
|
||
|
||
### 2. Baseball (UE)
|
||
- **Folder:** `NROM/Baseball (UE)/`
|
||
- **ROM:** `baseball.nes` (24,592 bytes)
|
||
- **Source:** `prg.s` (21,624 lines — largest source)
|
||
- **Linker:** PRG at $C000, 16 KB; single segment
|
||
- **Vectors:** NMI → $C046 (`NMI`), RESET → $C40B (`Reset`), IRQ → $C43E (`IRQ`, `rti`)
|
||
- **Key subsystems:** Queued event system ($EB66–$EB9C) as the main frame driver, round/state machine ($C5FE), batting/pitching ($C6044–$C6414), object sorting ($C339), sound driver ($F9D0–$FE2x)
|
||
- **Build fix:** None needed; byte-identical out of the box
|
||
- **Pass 3 symbols (2026-10-19):** **121 operands substituted** (85 single-name + 36 hardware) from `symbols.inc`/`locals.inc` via `_tools/apply_symbols.py` — zero residue. Rebuild stays byte-identical.
|
||
- **Details:** `Baseball (UE)/README.md`
|
||
|
||
### 3. Bomberman (U)
|
||
- **Folder:** `NROM/Bomberman (U)/`
|
||
- **ROM:** `bomberman.nes` (24,592 bytes)
|
||
- **Source:** `prg.s` (7,553 lines), `header.s`, `chr.s`
|
||
- **Linker:** HEADER at $0000 (16 bytes), PRG at $C000 (16 KB), CHR at $0000 (8 KB)
|
||
- **Vectors:** NMI → $C01A (`NmiHandler`), RESET → $C000 (`Reset`), IRQ → $FFF9 (`IrqHandler`, `rti`)
|
||
- **Key subsystems:** NMI-driven PPU command queue and VRAM transfers, main loop at $C368 with state dispatch table ($C75D), bomb/object slots (80 slots at $03E6), sound driver ($E642–$FE2x) with dispatch table ($E6AD)
|
||
- **Build fix:** One-byte mismatch at CPU $E71B (`dec $E4` vs `dec $54`) — resolved by adding `RandomStateAlt = $E4` to `locals.inc` alongside `RandomState0 = $54` (zero-page reuse); also renamed `ControllerState` → `ControllerState1`, `Main_HandleControl_C368` → `MainGameLoop`, `Gameplay_HandleControl_C79D` → `GameplayUpdate`, `Sound_HandleControl_E65F` → `SoundUpdate`
|
||
- **Pass 3:** Applied 354 single-name + 8 site-resolved multi-alias operands from `locals.inc`; 24 in-file table labels from `reconstructed.lbl`; 0 hardware substitutions needed. Residue: 758 unnamed operands (179 distinct addresses).
|
||
- **Details:** `Bomberman (U)/README.md`
|
||
|
||
### 4. Burger Time (U)
|
||
- **Folder:** `NROM/Burger Time (U)/`
|
||
- **ROM:** `Burger Time (U) [!].nes` (24,592 bytes)
|
||
- **Source:** `prg.s` (9,323 lines), `header.s`, `chr.s`
|
||
- **Linker:** HEADER, PRG at $C000 (0x3FFA), VECTORS at $FFFA, CHR
|
||
- **Vectors:** NMI → $FF7F (points *into* the vector page itself — not a real handler; NMI is effectively unused), RESET → $FD24 (`ResetHandler`, `sei` prologue), IRQ → $FD24 (reuses Reset)
|
||
- **Key subsystems:** Event-driven main loop via `CommonEngineExit` ($EB6A) and queued events ($EB9D), title screen / round state machine ($C5FE), object arrays ($03E6 state, $0436/$0486 position), audio engine ($F9D0–$FE2x) with music sequencer ($FD34)
|
||
- **Build fix:** None needed; byte-identical. Requires symlink `burger_time.nes → "../Burger Time (U) [!].nes"` due to spaces in ROM filename
|
||
- **Details:** `Burger Time (U)/README.md`
|
||
|
||
### 5. Clu Clu Land (JU)
|
||
- **Folder:** `NROM/Clu Clu Land (JU)/`
|
||
- **ROM:** `rom.nes` (24,592 bytes)
|
||
- **Source:** `prg.s` (9,151 lines)
|
||
- **Linker:** PRG at $C000, 16 KB; single segment (no separate HEADER/CHR segments in cfg, but CHR data is embedded inline at end of prg.s)
|
||
- **Vectors:** NMI → $C1F1 (`NMIHandler`), RESET → $C196 (`ResetEntry`, shared with the IRQ handler), IRQ → $C196 (`IrqHandler`, reuses Reset)
|
||
- **Key subsystems:** State-machine main loop via dispatch table at $C000–$C00D, NMI-driven PPU command queue + VRAM transfers, object pools ($03E6 state, $0436/$0486 position), sound driver ($E642–$F7C0) with dispatch table ($E6AD)
|
||
- **Build fix:** One `bpl` branch to undefined label at CPU $FAB4 — replaced with `bne *-$1B` to produce original `d0 e3` bytes (disassembler mislabeled `bne` as `bpl`)
|
||
- **Details:** `Clu Clu Land (JU)/README.md`
|
||
|
||
### 6. Defender 2 (U)
|
||
- **Folder:** `NROM/Defender 2 (U)/`
|
||
- **ROM:** `Defender 2 (U).nes` (24,592 bytes)
|
||
- **Source:** `prg.s` (11,905 lines)
|
||
- **Linker:** HEADER at $0000 (16 bytes), PRG at $C000 (0x3FFA), VECTORS at $FFFA, CHR at $0000
|
||
- **Vectors:** NMI → $CAA1 (`NmiHandler`), RESET → $C983 (`ResetHandler`), IRQ → $CA9E (`IrqHandler`, reuses Reset)
|
||
- **Key subsystems:** Event-driven main loop (`UpdateSideScrollingGameplay_CA6A` at $CA6A) waiting on NMI flag, side-scrolling gameplay ($C073–$C324 family), PPU streaming ($F20B–$F7C0), audio engine ($E642–$F7C0) with dispatch table ($E6AD)
|
||
- **Build fix:** Same `bpl` → `bne *-$1B` fix at CPU $E811 as Clu Clu Land (disassembler mislabeled `bne` as `bpl`)
|
||
- **Details:** `Defender 2 (U)/README.md`
|
||
|
||
### 7. Excitebike (JU)
|
||
- **Folder:** `NROM/Excitebike (JU)/`
|
||
- **ROM:** `rom.nes` (24,592 bytes)
|
||
- **Source:** `prg.s` (13,992 lines)
|
||
- **Linker:** PRG at $C000, 16 KB; single segment
|
||
- **Vectors:** NMI → $C23B (`NMI`), RESET → $C184 (`Reset`), IRQ → $FFF0 (points into audio data region — likely placeholder/unused)
|
||
- **Key subsystems:** NMI-driven state machine with dispatch table at $C000–$C00D (14 states), title/menu system ($C346–$C454), gameplay update chain ($C99A), race update ($C8D6), audio engine ($F8DE) with 4 channels + SFX, serial I/O over controller port $4016
|
||
- **Build fix:** Same `bpl` → `bne *-$1B` fix at CPU $FAB4 (same pattern as Clu Clu Land/Defender 2). On 2026-10-20 the last whole-ROM mismatch (byte 596) was fixed — two NMI operands the ROM spends on `$11`, a second PPU-mask shadow, were emitted with `PpuMaskShadow` (`$0A`); `$11` is now aliased `NmiMaskShadow` in `locals.inc`. The same day the audit trail was re-anchored from the ca65 listing via `_tools/repair_audit_comments.py` (6,339 shifted comments + 4,401 doubled-`??` forms) and all 58 raw `jsr/jmp $XXXX` operands were substituted with routine labels/`locals.inc` sub-entry equates.
|
||
- **Details:** `Excitebike (JU)/README.md`
|
||
|
||
### 8. Tennis (JU)
|
||
- **Folder:** `NROM/Tennis (JU)/`
|
||
- **ROM:** `Tennis (JU).nes` (24,592 bytes)
|
||
- **Source:** `prg.s` (9,268 lines)
|
||
- **Linker:** PRG at $C000, 16 KB; single segment
|
||
- **Vectors:** NMI → $C07D (`NmiHandler`), RESET → $C000 (`Reset`), IRQ → $C000 (`Reset` reused)
|
||
- **Key subsystems:** NMI-synchronized main loop (`MainLoop` at $C04F), game state machine via `MainStateHandlerTable` ($C101, 12 states), game mode state machine via `GameModeStateTable` ($CAD7, 8 states), object/sprite system with fixed-point physics, audio engine ($F8DE) with serial I/O over controller port
|
||
- **Build fix:** None needed; byte-identical out of the box
|
||
- **Pass 3 symbols (2026-10-19):** **18 single-name operands** substituted from `locals.inc` via `_tools/apply_symbols.py` — zero residue. Rebuild stays byte-identical.
|
||
- **Details:** `Tennis (JU)/README.md`
|
||
|
||
### 9. Pac-Man (USA) (Namco)
|
||
- **Folder:** `NROM/Pac-Man (USA) (Namco)/`
|
||
- **ROM:** `rom.nes` (24,592 bytes)
|
||
- **Source:** `prg.s` (9,268 lines)
|
||
- **Linker:** PRG at $C000, 16 KB; single segment
|
||
- **Vectors:** NMI → $C10E (`NmiHandler`), RESET → $C033 (`Reset`; `locals.inc` defines `ResetOffset = $C033`), IRQ → $C17E (`IrqHandler`)
|
||
- **Key subsystems:** NMI-synchronized main loop (`MainLoop` at $C04F), game state machine via `MainStateHandlerTable` ($C101, 12 states), game mode state machine via `GameModeStateTable` ($CAD7, 8 states), object/sprite system with fixed-point physics, audio engine ($F8DE) with serial I/O over controller port
|
||
- **Build fix:** None needed; byte-identical out of the box
|
||
- **Pass 3 symbols (2026-10-19):** **524 single-name operands** substituted from `locals.inc` via `_tools/apply_symbols.py` — **727 multi-alias residues** left numeric (addresses with 2+ aliases, e.g. `$00` = `workPtr0`/`Zp00`). Rebuild stays byte-identical.
|
||
- **Details:** `Pac-Man (USA) (Namco)/README.md`
|
||
|
||
### 10. Donkey Kong 3 (JUE)
|
||
- **Folder:** `NROM/Donkey Kong 3 (JUE)/`
|
||
- **ROM:** `Donkey Kong 3 (JUE).nes` (24,592 bytes)
|
||
- **Source:** `prg.s` (9,952 lines)
|
||
- **Linker:** HEADER at $0000 (16 bytes), PRG at $C000 (16 KB), CHR at $0000 (8 KB)
|
||
- **Vectors:** NMI → $C08D (`NmiHandler`; the `prg.s` header block records it as "Pass 2 control-flow entry at CPU $C08D"), RESET → $C000 (`Reset`), IRQ → $C000 (`Reset` reused)
|
||
- **Key subsystems:** Main loop with object/game state management at $C02E–$C18D, object movement and geometry calculations ($C28E–$C683), audio engine ($F8DE+) with sound channels ($F0–$FF), PPU command buffer streaming ($C3F4+)
|
||
- **Build fix:** Build split `main.s` into `header.s`, `prg.s`, `chr.s`; added `RandomStateAlt = $E4` for `dec $E4` at CPU $E71B (zero-page reuse with `RandomState0 = $54`). **2026-10-16 — one-byte branch-target bug fixed:** the project was recorded as BYTE-IDENTICAL but had never built byte-identical. The `bne` at CPU $C14C (PRG $014C) was annotated `D0 12` (target $C160) but assembled as `D0 0D`, because it was labelled `StoreSelectedPlayerAndScreenFlags` ($C15B) instead of the routine actually at $C160. Retargeted to `ClearAudioSetGameMode` — which is also the semantically correct target for a "mode != $01" test. `cmp` now passes.
|
||
- **Details:** `Donkey Kong 3 (JUE)/README.md`
|
||
|
||
### 11. Donkey Kong Jr. (JU)
|
||
- **Folder:** `NROM/Donkey Kong Jr. (JU)/`
|
||
- **ROM:** `Donkey Kong Jr. (JU).nes` (24,592 bytes)
|
||
- **Source:** `prg.s` (12,807 lines; 6,135 instructions, 266 routines, 68 data labels, 0 conflicts)
|
||
- **Linker:** HEADER at $0000 (16 bytes), PRG at $C000 (16 KB), CHR at $0000 (8 KB)
|
||
- **Vectors:** NMI → $C6E6 (`NmiHandler`), RESET → $C66E (`ResetHandler`), IRQ → $FFF0 (stray byte, effectively unused)
|
||
- **Key subsystems:** Reset idles in a PRNG-advance loop — the entire frame state machine (title/attract/gameplay/sound) runs inside the NMI handler; VRAM/event queue at $0300 with dispatch table at $BFFE; 8-byte PRNG at $18–$1F; sound timers at $F1AF
|
||
- **Build fix:** None needed; byte-identical out of the box (`make` in the project folder). **Pass 1 verified complete 2026-10-16** — a full byte-accounting audit of `prg.s` confirms all 16,384 PRG bytes are emitted exactly once (6,199 instructions + 3,889 `.byte` + 16 `.word`), every emitted value equals the ROM byte, and there are zero audit-comment mismatches or duplicate addresses. No `.incbin` remains. A complete-opcode static tracer independently reaches 6,135 instructions / 12,358 code bytes (75.4%) — every one of which is already present in the file, and the file carries 121 further code bytes the tracer does not find (reached via the `DeferredTaskHandlerTable` dispatch at $BFFE). Pass 2/3 naming is complete; Pass 3 tables are named (`DeferredTaskHandlerTable`, `HudDigitDescriptorTable`, …)
|
||
- **Details:** `Donkey Kong Jr. (JU)/README.md`
|
||
|
||
### 12. CIRCUS
|
||
- **Folder:** `NROM/CIRCUS/`
|
||
- **ROM:** `rom.nes` (24,592 bytes)
|
||
- **Source:** `prg.s` (~12,755 lines)
|
||
- **Linker:** HEADER at $0000 (16 bytes), PRG at $C000 (16 KB), CHR at $0000 (8 KB)
|
||
- **Vectors:** NMI → $C05A (`NmiHandler`), RESET → $C000 (`Reset`), IRQ → $4CB7 (outside mapped space — effectively unused)
|
||
- **Key subsystems:** NMI-driven frame state machine — main loop is a spin loop at $C057, all per-frame work runs in NMI; main state dispatcher at $C0D0 with 16-state pointer table; controller input with edge flags at $09; menu system with text table at $C763 ("CONTINUE", "STAGE", "SELECT", "PLAY"); palette/screen transfer via descriptor streams; VRAM queue processing; variant object state machine at $DC3F–$FE7B; audio engine with sequence data at $FABB–$FFFB
|
||
- **Build fix:** None needed; byte-identical out of the box (`make` in the project folder). Pass 1/2/3 complete — full code/data classification, semantic routine naming, and data table naming all done
|
||
- **Pass 3 symbols (2026-10-19):** **118 operands substituted** (38 single-name + 80 hardware) from `symbols.inc`/`locals.inc` via `_tools/apply_symbols.py` — **23 multi-alias residues** left numeric (addresses with 2 aliases: `$E4`=`Controller1Shift`/`ZpE4`, `$7C`=`WorkPointer0Lo`/`Zp7C`, `$7E`=`WorkPointer1Lo`/`Zp7E`). Rebuild stays byte-identical.
|
||
- **Details:** `CIRCUS/README.md`
|
||
|
||
### 13. Wild Gunman (U)
|
||
- **Folder:** `NROM/Wild Gunman (U)/`
|
||
- **ROM:** `rom.nes` (24,592 bytes)
|
||
- **Source:** `prg.s` (~3,000 lines with routine headers)
|
||
- **Linker:** HEADER at $0000 (16 bytes), PRG at $C000 (16 KB), CHR at $0000 (8 KB)
|
||
- **Vectors:** NMI → $C086 (`NmiHandler`), RESET → $C000 (`Reset`), IRQ → $C000 (reuses `Reset`)
|
||
- **Key subsystems:** NMI-driven frame loop — main loop is a spin loop waiting on NMI phase flag ($20); NMI handler does OAM DMA ($4014), PPU updates, and calls game logic subroutines ($C29F, $C233, $C3AC, $C265); main state dispatcher at $C0B3 based on `GameMode` ($30); reset copies sprite/OAM data from $C844 to $05F0; APU enabled via $4015 = $0F
|
||
- **Build fix:** None needed; byte-identical out of the box (`make` compares the whole ROM in the project folder: `cmp reconstructed.nes rom.nes`). **Pass 1 redone 2026-10-16** — the original tracer followed only RESET/NMI/IRQ and jsr/jmp/branch targets and knew just the 151 documented opcodes, so it missed Wild Gunman's runtime dispatch (`Label_C341`'s `pla`-based computed goto puts the jump table inline right after each `jsr $C341`) and filed ~4.9 KB of real code as `.byte` data. Code coverage went **1,597 instr / 3,352 B (20.5%) → 3,956 instr / 8,085 B (49.3%)**. **Pass 2 complete** — all 733 labels carry names (zero `Label_Cxxxx`/`SubCxxxx` remain), routine headers on every entry point, zero-page aliases in `locals.inc` (`GameMode`=$30, `NmiPhase`=$20, `NmiFlag`=$22, `Timer2F`=$2F, etc.). **Pass 3 complete** — data tables named: `SpriteAttributeTable` ($C6AC), `NoteVolumeTable` ($F3EF), `VolumeEnvelopeTable` ($F48F), `SpritePositionTable` ($F77C); the OAM sprite block at $C844 is documented in-place as a comment rather than a label
|
||
- **Pass 3 symbols (2026-10-19):** **76 operands substituted** (11 single-name + 65 hardware) from `symbols.inc`/`locals.inc` via `_tools/apply_symbols.py` — zero residue. Rebuild stays byte-identical.
|
||
- **Details:** `Wild Gunman (U)/README.md`
|
||
|
||
### 14. Joypad Test Cartridge (U)
|
||
- **Folder:** `NROM/Joypad Test Cartridge (U)/`
|
||
- **ROM:** `rom.nes` (24,592 bytes)
|
||
- **Source:** `prg.s` (4,401 lines; 202 routines, all with described headers)
|
||
- **Linker:** HEADER at $0000 (16 bytes), PRG at $C000 (16 KB), CHR at $0000 (8 KB)
|
||
- **Vectors:** NMI → $CCF7 (`NmiHandler`), RESET → $C000 (`Reset`), IRQ → $C000 (reuses `Reset`)
|
||
- **Key subsystems:** NMI-driven frame loop — main loop spins waiting on NMI phase; NMI handler does OAM DMA ($4014), PPU scroll/control latch, and burst VRAM writes from table at $0302; `VramPtrWrite` ($CD3F) uses a return-address modification trick at `RetAddrUpdate` ($CDC8) for runtime-computed dispatch; `VramWrite` ($CDEE) sets PPU address and writes data to PPUDATA; reset clears RAM, initializes PPU ($2000=$10, $2001=$00), triggers OAM DMA, and enters main loop
|
||
- **Build fix:** Byte-identical out of the box, but **Pass 1 was badly truncated and has been redone**. It claimed 282 instructions / 580 bytes (3.5%); the tracer halted at `$C09E` on `DCP $3C20` (`$CF`), an undocumented opcode used as ordinary code, and filed 3,256 bytes of real code as `.byte`. Now **1,773 instructions / 3,836 bytes (23.4%)**, verified against a fresh trace. `nesdis.py --undocumented` supplies the 105 undocumented NMOS opcodes; ca65 V2.19 encodes none of them, so the 4 affected instructions are emitted as explicit `.byte` with the disassembly in the comment. Pass 2 then renamed all 202 labels (zero `Label_Cxxxx` left) and rewrote all 202 routine headersr all labels, semantic naming for key routines, zero-page aliases in `locals.inc` (`VramPtrLo`=$00, `PpuCtrlShadow`=$EF, `FrameCounterLo`=$53, etc.)
|
||
- **Pass 3 symbols (2026-10-19):** **47 hardware operands** substituted from `symbols.inc` via `_tools/apply_symbols.py` — zero residue. Rebuild stays byte-identical.
|
||
- **Details:** `Joypad Test Cartridge (U)/README.md`
|
||
|
||
### 15. NES PowerPad Test Card (U)
|
||
- **Folder:** `NROM/NES PowerPad Test Card (U)/`
|
||
- **ROM:** `rom.nes` (24,592 bytes)
|
||
- **Source:** `prg.s` (8,842 lines)
|
||
- **Linker:** HEADER at $0000 (16 bytes), PRG at $C000 (16 KB), CHR at $0000 (8 KB)
|
||
- **Vectors:** NMI → $E06E (`NmiHandler`), RESET → $E000 (`Reset`), IRQ → $E000 (reuses `Reset`)
|
||
- **Key subsystems:** Minimal NMI-driven test cartridge — NMI reads PowerPad via $4016, processes transitions, updates score/lives display; APU at $4015=$0F; 7.2% code coverage
|
||
- **Build fix:** None needed; byte-identical out of the box
|
||
- **Pass 3 symbols (2026-10-19):** **89 hardware operands** substituted from `symbols.inc` via `_tools/apply_symbols.py` — zero residue. Rebuild stays byte-identical.
|
||
- **Details:** `NES PowerPad Test Card (U)/README.md`
|
||
|
||
### 16. MUSCLE (U)
|
||
- **Folder:** `NROM/MUSCLE (U)/`
|
||
- **ROM:** `M.U.S.C.L.E. (U).nes` (24,592 bytes); `rom.nes` is a relative symlink `../M.U.S.C.L.E. (U).nes`
|
||
- **Source:** `prg.s` (Pass 1/2/3 output, with 42 bytecode listings above the `.byte` data)
|
||
- **Linker:** HEADER at $0000 (16 bytes), **PRG at $8000 (16 KB)**, CHR at $0000 (8 KB) — the one ROM in the set mapped *low*
|
||
- **Vectors:** NMI → $86CB (`NmiHandler`), RESET → $8000 (`Reset`), IRQ → $8764 (a bare `RTI` that doubles as the NMI epilogue). Vectors themselves sit in the $C000 mirror at $FFFA.
|
||
- **Key subsystems:** bytecode VM — 40 opcodes at `$C8-$EF` handled through a table at `$9237`, everything else a literal operand. Gameplay dispatches through three jump tables plus two zero-page `jmp (zp)` calls a static descender cannot follow: 38-entry token-program pointer table at `$8CEF`, 40-entry opcode handler table at `$9237`, 16-entry handler table at `$9F2B`, 3-entry per-level VRAM-writer table at `$AC35`. Compressed-VRAM RLE decoder at `$AC82` with a 12-byte fill table at `$ACBD`; division by 20 restored at `$82AC`; four-channel sound engine with per-channel state in zero page `$C4-$EF`.
|
||
- **Build fix:** the skeleton's `$C000` linker assumption was wrong — RESET is `$8000`, so `linker.cfg` had to move. `Makefile` tool paths were `../../../_tools/` while in `_wip/`; promotion to top-level required `../../_tools/`. `make regen` (pass1→pass2→pass3) reproduces `prg.s` byte-for-byte.
|
||
- **Pass 3 symbols (2026-10-19):** **220 operands substituted** (91 single-name + 129 hardware) from `symbols.inc`/`locals.inc` via `_tools/apply_symbols.py` — zero residue. Rebuild stays byte-identical.
|
||
- **Details:** `MUSCLE (U)/README.md`
|
||
|
||
### 17. Lunar Pool (U)
|
||
- **Folder:** `NROM/Lunar Pool (U)/` (promoted out of `_wip/` 2026-10-18 by `git mv`, so the relative `rom.nes` symlink is live and tool paths are `../../_tools/`)
|
||
- **ROM:** `Lunar Pool (U).nes` (24,592 bytes)
|
||
- **Source:** `prg.s` (5,300 instructions, 67.6% code / 11,077 bytes; 705 labels, zero `Label_` residue, 38 semantic zero-page aliases + 66 neutral, 33 named data tables)
|
||
- **Linker:** HEADER at $0000 (16 bytes), PRG at $C000 (16 KB), CHR at $0000 (8 KB)
|
||
- **Vectors:** NMI → $FF65 (`NmiHandler`), RESET → $E80C (non-$C000 entry), IRQ → $FF64 (bare `rti`, adjacent to NMI)
|
||
- **Key subsystems:** NMI-driven frame loop with PPU command queue and VRAM transfers; main loop at $E80C; side-scrolling / pool gameplay; audio engine; print-inline-string helper at $CBDC/$CBC9
|
||
- **Build fix:** Promotion from `_wip/` added `header.s`, `chr.s`, HEADER/PRG/CHR `linker.cfg`, and whole-ROM `cmp`; rebuilt from Mesen CDL capture (10,028 bytes Code). **Pass 1/2/3 complete** — byte-identical at whole-ROM level.
|
||
- **Pass 3 symbols (2026-10-19):** **45 operands substituted** (18 single-name + 27 hardware) from `symbols.inc`/`locals.inc` via `_tools/apply_symbols.py` — zero residue. Rebuild stays byte-identical.
|
||
- **Details:** `Lunar Pool (U)/README.md`
|
||
|
||
### 18. Donkey Kong (JU)
|
||
- **Folder:** `NROM/Donkey Kong (JU)/` (promoted out of `_wip/` 2026-10-19 by `git mv`, so the relative `rom.nes → ../Donkey Kong (JU).nes` symlink survived)
|
||
- **ROM:** `Donkey Kong (JU).nes` (24,592 bytes)
|
||
- **Source:** `prg.s` (6,014 instructions, 76.3% code / 12,505 bytes; 1,015 labels with **zero `Label_` residue**, 145 zero-page slots with neutral `ZpXX` names, 10 named data regions)
|
||
- **Linker:** HEADER at $0000 (16 bytes), PRG at $C000 (16 KB), CHR at $0000 (8 KB)
|
||
- **Vectors:** NMI → $C85F (`NmiHandler`), RESET → $C79E (non-$C000 entry, like DK Jr.), IRQ → $FFF0 (vector-page padding, unused)
|
||
- **Key subsystems:** reset enters at $C79E; NMI-driven frame loop; dispatchers at $C807/$C815/$C823/$C831/$C847 load 16-bit pointers from `ObjectPtrTable` ($C03C) and from `$C4A7,x`; large level-data pointer block $C044–$C79D; sound engine over `MusicDataTable` ($F55B), `APUDataTable` ($FAE6), `SfxDataTable` ($FE59)
|
||
- **Pass 2 (2026-10-19):** all 919 `Label_XXXX` definitions named — 102 new semantic routine names + 217 `SubC<addr>` entry names (honest residue) + 600 derived `<Routine>_Block[_n]` internal branch targets; `jsr`/`jmp` operands stay numeric (`Wild Gunman (U)` style). Applied with `_tools/pass2.py apply`; `make` still byte-identical
|
||
- **Build fix:** none at PRG level — it was PRG-identical in `_wip/` and stayed byte-identical through Pass 3. Promotion added `header.s`, `chr.s`, a HEADER/PRG/CHR `linker.cfg`, the `rom.nes` symlink, and the whole-ROM `cmp`; no `_tools` path change (the Makefile never referenced `_tools/`) and no `make regen` target. Mirroring was recorded as Vertical in the project README (then named OVERVIEW) but header byte 6 = $00 says **Horizontal** — corrected at promotion
|
||
- **Pass 3 symbols (2026-10-19):** **75 operands substituted** (17 single-name + 58 hardware) from `symbols.inc`/`locals.inc` via `_tools/apply_symbols.py` — zero residue. Rebuild stays byte-identical.
|
||
- **Details:** `Donkey Kong (JU)/README.md`
|
||
|
||
### 31. Pac-Man (Tengen) (U)
|
||
- **Folder:** `NROM/Pac-Man (Tengen) (U)/` (promoted out of `_wip/NROM/` 2026-10-20 by `git mv`)
|
||
- **ROM:** `Pac-Man (Tengen) (U) [!].nes` (24,592 bytes), reached through the `rom.nes` symlink
|
||
- **Source:** `prg.s` (4,595 lines; 1,637 instruction lines covering 3,273 code bytes = 20.0%; 227 labels — 199 routine entries + 28 branch targets — **zero `Label_` residue**, zero raw `$XXXX` jsr/jmp/branch operands, 2,479 canonical audit comments, 0 byte mismatches against `prg.bin`)
|
||
- **Linker:** HEADER at $0000 (16 bytes), PRG at $C000 (16 KB), CHR at $0000 (8 KB)
|
||
- **Vectors:** NMI → $C0FA (`NmiHandler`), RESET → **$C033** (`Reset` — the boot sequence is inline here; there is no boot code at $FF00 in this build), IRQ → $C16A (`IrqHandler`)
|
||
- **Key subsystems:** NMI frame loop with two controller reads; game-state dispatch through `GameStateDispatchTable` ($C253); maze graphics (`MazeTileGraphics` $C2FD, `AttributeTableData` $C387, `BorderPattern` $C432); ghost AI with the target search at $C8AA and the four-ghost slots; `UpdateMazeTiles` ($DAB0) rewriting the maze through the four overlay tables; score/attribute VRAM writes; the level-script interpreter at $EE8F dispatching through `ScriptCommandTable` ($EFDD)
|
||
- **Variant:** a **different build** of the same game as row 32 — 56 PRG bytes differ in 8 runs, all of them code-versus-licensee-text (`$C3E3-$C408` is 26 spaces here against `LICENSED BY NAMCO AMERICA INC` there; `$FF00-$FF16` is `$FF` padding here against the boot code there), and the RESET vector differs to match. The CHR is identical
|
||
- **Build fix:** none at PRG level — it was PRG-identical in `_wip/` and stayed byte-identical through Pass 2/3. Promotion added `header.s`, `chr.s`, a HEADER/PRG/CHR `linker.cfg`, the `rom.nes` symlink and the whole-ROM `cmp`; the first promoted build was byte-identical (MD5 `d34e7a74…28ad0`)
|
||
- **Pass 2 (2026-10-20):** a fresh map derived from this dump's own committed split — no name, map or file was carried over from the row-32 dump. All 194 `Label_XXXX` definitions renamed to semantic routine entries plus `<Routine>_<Role>` branch targets, and all 48 raw `$XXXX` call operands resolved. Recorded in `routinemap.tsv`
|
||
- **Pass 3 (2026-10-20):** 30 semantic zero-page aliases, each applied only at the sites where its role is proven (the per-site choice is in `sites.tsv`; the addresses that carry two roles keep the neutral `ZpXX` name elsewhere, and `locals.inc` records the reason for every remaining neutral slot). 28 data tables named — including `CharacterDataTable` ($C66A) and `CharacterNameStrings` ($C67E), where the ROM itself names Blinky, Pinky, Inky and Clyde. `apply_symbols.py` reports **0 residue**
|
||
- **Pass 1 correction (2026-10-20):** six command handlers recovered. `ScriptCommandTable` ($EFDD) is read by the traced instruction at $EFCC, and six of its entries point at $F00A, $F022, $F03A, $F052, $F062 and $F072 — all of which the tracer had left as data, and two of which it had mis-split across the `jmp $EF61` at $F01F and $F04F. Those 120 bytes are code here, decoded straight from the ROM. **The same gap exists in the promoted row-32 dump**, which has not been corrected
|
||
- **Residue:** the unreached main game logic at **$C45A–$C55F** is still `.byte` data. It is code — the tracer's own decoder walks it cleanly and the dispatch table at $C511 points into it — but nothing reaches it, so it cannot be entered without a guess. The same gap exists in the row-32 dump. Re-deriving it is a Pass 1 job; a Mesen Code Data Logger capture is the tool the repo uses (`_tools/cdl_reclass.py`)
|
||
- **Details:** `Pac-Man (Tengen) (U)/README.md`
|
||
|
||
### 32. Pac-Man (U)
|
||
- **Folder:** `NROM/Pac-Man (U)/` (promoted out of `_wip/NROM/` 2026-10-20 by `git mv`; tool paths stay `../../_tools/`)
|
||
- **ROM:** `Pac-Man (U) [!].nes` (24,592 bytes), reached through the `rom.nes` symlink
|
||
- **Source:** `prg.s` (4,511 lines; 1,549 audited instruction lines covering 3,058 code bytes, plus 49 `jsr`/`jmp` call sites — 19.6% code by the Pass 1 tracer's accounting; **zero `Label_` residue**, zero raw `$XXXX` call operands)
|
||
- **Linker:** HEADER at $0000 (16 bytes), PRG at $C000 (16 KB), CHR at $0000 (8 KB)
|
||
- **Vectors:** NMI → $C0FA (`NmiHandler`), RESET → **$FF00** (`Reset` — real boot code at the vector-page tail, not padding: `sei`/`cld`, PPU off, double vblank wait, `jmp ColdStart` at $C042), IRQ → $C16A (`IrqHandler`)
|
||
- **Key subsystems:** NMI-driven frame loop; game-state dispatch through `GameStateDispatchTable` ($C253) via `jmp (DispatchPtrLo)`; entity dispatch through `EntityPtrTable` ($D912) and a second table at $D9B9; palette upload from $0299/$02A9; VRAM write queue at $026B/$0272; audio engine with `AudioCommandTable` ($EFDD) dispatched via `jmp (AudioHandlerPtrLo)`; 15-byte copyright signature `ProgrammerSig` ($C0EB) checked against RAM at $0052
|
||
- **Build fix:** none at PRG level — it was PRG-identical in `_wip/` and stayed byte-identical through Pass 2/3. Promotion added `header.s`, `chr.s`, a HEADER/PRG/CHR `linker.cfg`, the `rom.nes` symlink and the whole-ROM `cmp`; the first promoted build was byte-identical (MD5 `a69d310f8cae9397fbd39f204672b5c7`)
|
||
- **Pass 2 (2026-10-20):** fresh map derived from the committed split (not from a drafted map): all 194 `Label_XXXX` definitions renamed to semantic routine entries plus `<Routine>_<Role>_<addr>` internal branch targets, and all 49 `jsr`/`jmp` call sites resolved to labels. Recorded in `routinemap.tsv` / `derived_names.tsv`
|
||
- **Pass 3 symbols (2026-10-20):** **119 operands substituted** (101 hardware + 11 single-name + 7 multi-alias resolved per site via `sites.tsv`) — `apply_symbols.py` reports **0 residue**. The 7 site resolutions are all proven from context: four `jmp ($0010)` immediately preceded by `sta DispatchPtrLo`/`sta DispatchPtrHi`, one `jmp ($00FE)` preceded by `sta AudioHandlerPtrLo`/`sta AudioHandlerPtrHi`, and two `sta a:$0000,y` zero-page clears that take the neutral `Zp00`. Audit-comment alignment was re-done afterwards with the new `_tools/align_audit_comments.py` (whitespace-only)
|
||
- **Details:** `Pac-Man (U)/README.md`
|
||
|
||
### 29. Hogan's Alley (JU)
|
||
- **Folder:** `NROM/Hogan's Alley (JU)/` (promoted out of `_wip/NROM/` 2026-10-20 by `git mv`)
|
||
- **ROM:** `Hogan's Alley (JU).nes` (24,592 bytes), reached through the `rom.nes` symlink
|
||
- **Source:** `prg.s` (10,920 lines; 3,950 instruction lines covering 8,041 code bytes = 49.1%; 681 labels, **zero `Label_` residue**, zero raw `$XXXX` jsr/jmp/branch operands, 4,490 canonical audit comments, 0 byte mismatches against `prg.bin`)
|
||
- **Linker:** HEADER at $0000 (16 bytes), PRG at $C000 (16 KB), CHR at $0000 (8 KB)
|
||
- **Vectors:** NMI → $C088 (`NmiHandler`), RESET → $C000 (`Reset`), IRQ → $C000 (the same address)
|
||
- **Key subsystems:** the frame heartbeat — the NMI sets `GameFramePending` ($20) and the main loop spends it, with `NmiPhaseFlag` ($22) stopping the per-frame work from running twice; an **inline** dispatch architecture — `IndirectCall` at $C34D pops the return address of the `jsr` that called it and reads a 16-bit handler pointer from the word that follows, so the six handler tables live *inside* the code stream ($C124 19 entries, $C219 4, $C89C 14, $CDD1 1, $D234 2, $D3D6 14); the Zapper on `$4017` (`ReadZapper` $CF3E) with the controller debounced over five frames into `Player1Buttons` ($16); a three-accumulator sound engine (`SoundFlag0`/`1`/`2` at $F0–$F2) fed by 24 one-bit stubs and read at $F9FF/$FC48/$FAFC, with the note records in `NoteParameterTable` ($FCC8)
|
||
- **Build fix:** none at PRG level — it was PRG-identical in `_wip/` and stayed byte-identical through Pass 2/3. Promotion added `header.s`, `chr.s`, a HEADER/PRG/CHR `linker.cfg`, the `rom.nes` symlink and the whole-ROM `cmp`; the first promoted build was byte-identical
|
||
- **Pass 1 correction (2026-10-20):** the static trace classified only 41.8 % of the PRG as code. A fresh Mesen Code Data Logger capture was merged with the four captures already in the folder (`hogans_merged.cdl`, the OR of five per-byte flag arrays, 6,544 code bytes) and `_tools/cdl_reclass.py` rewrote the split to match what the CPU actually fetched: **1,216 bytes** moved from data to code, five moved the other way and 59 labels were emitted. The four branch targets the tool could not prove were turned into labels by the new `_tools/resolve_raw_branches.py`
|
||
- **Pass 2 (2026-10-20):** a fresh map derived from this dump's own committed split: 206 routine entries hand-named and 413 internal branch targets derived mechanically by `_tools/derive_branch_names.py`, 630 `Label_XXXX` definitions gone, 484 raw `$XXXX` call operands resolved, 15 call targets the tracer had never labelled given a label. Recorded in `routinemap.tsv`
|
||
- **Pass 3 (2026-10-20):** 60 semantic zero-page aliases, each applied only where its role is proven (`zp_aliases.inc` and `zp_alias_sites.tsv`); the slots that stay neutral are each listed with the reason. 34 data tables named — `SubStateHandlerTable`, `ModeHandlerTable`, `HandlerDispatchTable`, `ActorCommandTable`, `TargetBehaviourTable`, `NoteParameterTable` and the rest — and recorded in `data_region_names.tsv`. `apply_symbols.py` reports **1 residue**: `sta a:$00B4,y` at $C203, the same address as `Zp40`/`ActorPalette` but forced to absolute addressing, so it must stay numeric
|
||
- **Residue:** no `make regen` target. The Pass 1 split here is the static trace *corrected* by a CDL capture, and the base the correction was applied to is not what the current `_tools/nesdis.py` produces, so a regen pipeline could not reproduce `prg.s` byte for byte. `prg.s` is the maintained source of truth
|
||
- **Details:** `Hogan's Alley (JU)/README.md`
|
||
|
||
### 30. Mario Bros (JU)
|
||
- **Folder:** `NROM/Mario Bros (JU)/` (promoted out of `_wip/NROM/` 2026-10-20 by `git mv`)
|
||
- **ROM:** `Mario Bros (JU).nes` (24,592 bytes), reached through the `rom.nes` symlink
|
||
- **Source:** `prg.s` (16,345 lines; 6,210 instruction lines covering 12,847 code bytes = 78.4%; 1,025 labels, **zero `Label_` residue and zero `SubC` residue**, zero raw `$XXXX` jsr/jmp/branch operands, 6,458 canonical audit comments, 0 byte mismatches against `prg.bin`)
|
||
- **Linker:** HEADER at $0000 (16 bytes), PRG at $C000 (16 KB), CHR at $0000 (8 KB)
|
||
- **Vectors:** NMI → $C07D (`NmiHandler`), RESET → $C000 (`Reset`), IRQ → $C000 (the same address)
|
||
- **Key subsystems:** the frame heartbeat — the NMI sets `FramePendingFlag` ($20) and the main loop spends it, with `NmiPhaseFlag` ($22) stopping the NMI handler from doing its per-frame work twice; an **inline** dispatch table — the handler pointers sit in the middle of the code stream, right after the call that reads them, so the static tracer cannot follow them (`GameStateHandlerTable` $C510 and its five continuation blocks); a script interpreter that drives the enemies (`SetupScriptPointer` $CB85, `FetchScriptByte` $E9FA, `RunScript` $E9D3) with the command byte compared against $AA and $BB; the Zapper-free controller read with a five-frame debounce into `Zp10`/`Zp11`; a per-note sound engine at $F8A7–$FD27 working from the note table at $FCC8
|
||
- **Build fix:** none at PRG level — it was PRG-identical in `_wip/` and stayed byte-identical through Pass 2/3. Promotion added `header.s`, `chr.s`, a HEADER/PRG/CHR `linker.cfg`, the `rom.nes` symlink and the whole-ROM `cmp`; the first promoted build was byte-identical
|
||
- **Pass 1 correction (2026-10-20):** the committed split was a strict subset of the correct one — only 72.0% of the PRG was classified as code. A Mesen Code Data Logger capture of this ROM (`mario_mesen.cdl`, 10,915 code bytes) showed **1,010 bytes** the tracer had left as data were code; the two branch targets the capture never reached (`$E4CB` and `$E639`) were forced with `--override` and account for 57 more, so **1,067 bytes** moved from data to code and 22 moved the other way. The biggest single win is `$D508`–`$D56D`, a hundred bytes that decode as a coherent routine, and `$CA3B`–`$CA5D`, the tile-drawing routine. The three branch targets the reclassifier could not prove were turned into labels by `_tools/resolve_raw_branches.py`
|
||
- **Pass 2 (2026-10-20):** a fresh map derived from this dump's own committed split: 206 routine entries and 519 internal branch targets, 931 `Label_XXXX` definitions gone, 51 raw `$XXXX` call operands resolved and 12 call targets the tracer had never labelled given a label. **Zero `SubC` residue**: the 185 entries the previous session had left as address-derived residue were all named from the code. Recorded in `routinemap.tsv`
|
||
- **Pass 3 (2026-10-20):** 25 semantic zero-page aliases, each applied only where its role is proven (`zp_aliases.inc`); the slots that stay neutral are each listed with the reason. 35 data tables named — `GameStateHandlerTable`, `EnemyBehaviourTable`, `EnemyScriptTable`, `EnemyTypePointerTable`, `SoundRoutineTable`, `NoteFrequencyTable` and the rest — and recorded in `data_region_names.tsv`. `apply_symbols.py` reports **0 residue**
|
||
- **Details:** `Mario Bros (JU)/README.md`
|
||
|
||
### 33. Pyramid (U) (Sachen)
|
||
- **Folder:** `NROM/Pyramid (U) (Sachen)/` (promoted out of `_wip/NROM/` 2026-10-20 by `git mv`; the folder was renamed from `NROM/Pyramid (U)` on 2026-10-21 to match the inventory row)
|
||
- **ROM:** `Pyramid (U) (Sachen).nes` (24,592 bytes), reached through the `rom.nes` symlink
|
||
- **Source:** `prg.s` (8,253 lines; 3,130 instruction lines covering 6,493 code bytes = 39.6%; 463 labels, **zero `Label_` residue**, zero raw `$XXXX` jsr/jmp/branch operands, 3,762 canonical audit comments, 0 byte mismatches against `prg.bin`)
|
||
- **Linker:** HEADER at $0000 (16 bytes), PRG at $C000 (16 KB), CHR at $0000 (8 KB)
|
||
- **Vectors:** NMI → $D72E (`NmiHandler`), RESET → $FF00 (`Reset`), IRQ → $FF00 (the same address — `sei` is never undone, so the IRQ never fires)
|
||
- **Key subsystems:** the unlicensed Sachen boot (`sta $4100` mapper unlock with a delay loop at $FF4C, the "A"/"V" check on RAM $0120/$0121 at $FF57, the seed at $FF69, the clear at $FF74, the hand-off to the game's own entry at $C800); a task table of `jmp` trampolines that live inside the data regions ($C01E, $C02A, $C042, $C054) plus ten more at $C000–$C01B; two queued-event dispatchers that jump through the zero page with `jmp ($0002)` ($C3A3 with `TaskVectorTable1` $C3A6, $CCCA with `TaskVectorTable2` $CCD5); a VRAM command list assembled in the $0700 buffer and flushed by `FlushVramCommandList`; the actor grid at $0436 with the actor tables at $D320/$D4EE/$D5D5; a four-voice sound engine with its period, envelope and sample tables
|
||
- **Build fix:** none at PRG level — it was PRG-identical in `_wip/` and stayed byte-identical through Pass 2/3. Promotion added `header.s`, `chr.s`, a HEADER/PRG/CHR `linker.cfg`, the `rom.nes` symlink and the whole-ROM `cmp`; the first promoted build was byte-identical (MD5 `aa285ff1…6c59e2`)
|
||
- **Pass 1 correction (2026-10-20):** the committed split was a strict subset of the correct one — **828 bytes** of code were still marked as data, because the tracer cannot follow a `jmp` that sits inside a data region. Re-tracing with the sixteen `jmp`-table targets, the `$C800` boot mainline and six further code starts seeded by hand recovers them (plus a five-byte stub at $DF89 in a hole between two routines), and the re-trace loses **no** committed code byte. `make regen` reproduces the split, so it stays verifiable
|
||
- **Pass 2 (2026-10-20):** a fresh map derived from this dump's own committed split: 431 routine entries and the 32 data blocks named, 428 `Label_XXXX` definitions gone, 320 raw `$XXXX` call operands resolved. The internal branch-target names are derived mechanically from the branch that reaches them by `_tools/derive_branch_names.py`. Recorded in `routinemap.tsv`
|
||
- **Pass 3 (2026-10-20):** 24 semantic zero-page aliases, each applied only where its role is proven (`zp_aliases.inc`); the 57 slots that stay neutral are each listed with the reason. 32 data tables named — `TaskVectorTable1`/`TaskVectorTable2`, `LevelScriptData`, `MusicPeriodTable`, `SoundEnvelopeTable`, the actor tables — and recorded in `data_region_names.tsv`. `apply_symbols.py` reports **0 residue**
|
||
- **Residue:** the zero page is reused heavily — 410 references still carry a neutral name, mostly the general-purpose scratch of the shift and arithmetic helpers. 482 absolute operands point at RAM and stay numeric. `sta $4100` stays a raw operand: it is outside the `$2000-$4017` range `PROMPTS.md` asks to be symbolic, and no hardware name would describe a mapper unlock
|
||
- **Details:** `Pyramid (U) (Sachen)/README.md`
|
||
|
||
|
||
### 34. Raid on Bungeling Bay (U)
|
||
- **Folder:** `NROM/Raid on Bungeling Bay (U)/` (promoted out of `_wip/NROM/` 2026-10-20 by `git mv`)
|
||
- **ROM:** `Raid on Bungeling Bay (U).nes` (24,592 bytes), reached through the `rom.nes` symlink
|
||
- **Source:** `prg.s` (~14,300 lines; 255 `SubC<addr>` entry points, 612 `Sub_<Role>_<addr>` branch names, **zero `Label_` residue**, zero raw `$XXXX` jsr/jmp/branch operands)
|
||
- **Linker:** HEADER at $0000 (16 bytes), PRG at $C000 (16 KB), CHR at $0000 (8 KB)
|
||
- **Vectors:** NMI → $C04C (`NmiHandler`), RESET → $C000 (`Reset` → `ResetEntry` at $C6E3), IRQ → $C2C0 (`IrqHandler`)
|
||
- **Key subsystems:** NMI frame loop with two paths (`NmiPathSelector` $C4: minimal vs full); state bitmap at $0200 dispatching on bits 0–3; PPU helper at $C006; sprite/OAM update at $C08E; palette update at $C4E4; main game logic at $C17A; PRNG at $C412; four computed indirect jumps at $E2EC / $E79D / $E7A0 / $E7A3
|
||
- **Build fix:** none at PRG level — it was PRG-identical in `_wip/` and stayed byte-identical through Pass 2/3. Promotion added `header.s`, `chr.s`, a HEADER/PRG/CHR `linker.cfg`, the `rom.nes` symlink and the whole-ROM `cmp`; the first promoted build was byte-identical (MD5 `77285503…885000ac`)
|
||
- **Pass 3 (2026-10-20):** 11 semantic zero-page aliases added to `locals.inc` and applied at the proven sites. One of them was **corrected** while the `[a2]` sibling was finished: `$EA` had been named `VBlankWaitCounter`, but the routine at `$C412` is the game's PRNG (the classic `eor`/`asl`/`php`/`lsr`/`plp`/`rol` scrambler, called thirteen times from gameplay code, twice in a row at `$CDF4`/`$CDF9` with the second result masked `#$07`), so `$EA` is the scrambler's phase counter. Renamed `PrngPeriodCounter`, and `$EB`/`$EC` were named `PrngSeedB`/`PrngState`. Two `sta a:IndDispatch17,y` operands that were absolute stores to RAM `$0017` were also corrected to `a:Zp17,y`
|
||
- **Details:** `Raid on Bungeling Bay (U)/README.md`
|
||
|
||
### 35. Raid on Bungeling Bay (U) [a2]
|
||
- **Folder:** `NROM/Raid on Bungeling Bay (U) [a2]/` (promoted out of `_wip/NROM/` 2026-10-20 by `git mv`)
|
||
- **ROM:** `Raid on Bungeling Bay (U) [a2].nes` (24,592 bytes), reached through the `rom.nes` symlink
|
||
- **Source:** `prg.s` (14,326 lines; 5,079 instruction lines covering 10,536 code bytes = 64.3%; 866 labels — 252 `SubC<addr>` entries + 610 `Sub_<Role>_<addr>` branch names — **zero `Label_` residue**, zero raw `$XXXX` jsr/jmp/branch operands, 5,467 canonical audit comments, 0 byte mismatches against `prg.bin`)
|
||
- **Linker:** HEADER at $0000 (16 bytes), PRG at $C000 (16 KB), CHR at $0000 (8 KB)
|
||
- **Vectors:** NMI → $C04C (`NmiHandler`), RESET → $C000 (`Reset` → `ResetEntry` at $C6E3), IRQ → $C2C0 (`IrqHandler`)
|
||
- **Key subsystems:** same structure as row 34 — NMI frame loop with two paths, state bitmap at $0200, PPU helper at $C006, sprite/OAM update at $C08E, palette update at $C4E4, main game logic at $C17A, PRNG at $C412, four computed indirect jumps
|
||
- **Variant:** a **different build** of the same game as row 34 — 150 of the 16,384 PRG bytes differ, in 7 runs, all of them code-versus-copyright-text at `$C67D–$C6D8` and `$C73B–$C779`; the CHR differs too; header byte 6 is $00 (Horizontal) against row 34's $01 (Vertical). The zero-page reference sets are otherwise identical
|
||
- **Build fix:** none at PRG level — it was PRG-identical in `_wip/` and stayed byte-identical through Pass 2/3. Promotion added `header.s`, `chr.s`, a HEADER/PRG/CHR `linker.cfg`, the `rom.nes` symlink and the whole-ROM `cmp`; the first promoted build was byte-identical (MD5 `659d340a1e9d420eee28df13319b0094`)
|
||
- **Pass 3 (2026-10-20):** 15 semantic zero-page aliases added to `locals.inc` and applied at the proven sites — every alias is applied only where its role is proven, and the addresses that carry two names keep the neutral name at the sites where the other role applies (`$01` is `PtrHi` at the 16-bit compare and `IndDispatch01` at the dispatch; `$17` is `IndDispatch17` at the dispatch and `Zp17` for the absolute RAM `$0017` store in the copy loop). The new `_tools/apply_zp_aliases.py` does the per-site substitution, because `apply_symbols.py` only rewrites numeric operands
|
||
- **Details:** `Raid on Bungeling Bay (U) [a2]/README.md`
|
||
|
||
### 36. Urban Champion (JU)
|
||
- **Folder:** `NROM/Urban Champion (JU)/`
|
||
- **ROM:** `Urban Champion (JU).nes` (24,592 bytes)
|
||
- **Source:** `prg.s` (~4,000 lines)
|
||
- **Linker:** PRG at $C000, 16 KB; single segment
|
||
- **Vectors:** NMI → $CA91 (`NmiHandler`), RESET → $CA00 (`Reset`), IRQ → $CA00 (reuses `Reset`)
|
||
- **Key subsystems:** NMI-driven frame loop with simple fight game logic; minimal code (33.9%)
|
||
- **Build fix:** None needed; byte-identical out of the box
|
||
- **Pass 3 symbols (2026-10-19):** **70 operands substituted** (4 single-name + 66 hardware) from `symbols.inc`/`locals.inc` via `_tools/apply_symbols.py` — zero residue. Rebuild stays byte-identical.
|
||
- **Details:** `Urban Champion (JU)/README.md`
|
||
|
||
### 37. Xevious (U)
|
||
- **Folder:** `NROM/Xevious (U)/` (promoted out of `_wip/NROM/Xevious (U)/`)
|
||
- **ROM:** `Xevious (U).nes` (32,768 bytes)
|
||
- **Source:** `prg.s` (Pass 3; 868 labels)
|
||
- **Linker:** HEADER at $0000, PRG at $8000-$FFFF, CHR at $0000-$1FFF
|
||
- **Vectors:** NMI → $FC4E (`NmiHandler`), RESET → $FAF6 (`Reset`), IRQ → $FF1D (`IrqHandler`)
|
||
- **Key subsystems:** NMI-driven frame loop with OAM DMA, PPU scroll/control latch, controller reading with shift register on $4016/$4017; two computed-dispatch mechanisms: `jmp ($fe)` through a 16-entry table at $BA8B (sprite attribute dispatch), `jmp ($4)` through a 64-entry table at $CA0A (object update dispatch); game mode state machine (title/game/demo) driven by `GameMode` ($10) and `GameSubMode` ($1B); object iteration, movement and drawing; sprite attribute packing into OAM
|
||
- **Build fix:** none at PRG level — it was PRG-identical in `_wip/` and stayed byte-identical through Pass 3. Promotion added `header.s`, `chr.s`, a HEADER/PRG/CHR `linker.cfg`, the `rom.nes` symlink and the whole-ROM `cmp`
|
||
- **Pass 1 correction:** static trace from vectors reached only 13.6% of PRG. Declaring both jump tables via `--table` plus 92 hand-seeded entry points recovered code behind computed dispatch, reaching 34.5%. On 2026-10-21 the split was redone from the project's Mesen CDL with `_tools/cdl_reclass.py`: 1,158 bytes data→code, 48 code→data, 42 labels emitted, giving 12,455 code bytes (38.0%) and 6,002 instructions; the 45 recovered entries are named `Sub_XXXX`, so no `Label_` remains
|
||
- **Pass 3 tables:** 32 named data tables, including the $A74B-$B8AA block split into `VramWritePtrTable`, `VramWriteData`, `DataStreamPtrTable`, `ObjTilePtrTable`, `ObjTileData` and `DataStreamData`; the 4-entry pointer table at $D833; `ObjSpeedTable`/`ObjSpeedTable2`/`SpriteLayoutPtrTable`/`SpriteLayoutData` at $F957-$FAF5; `PaletteData`/`OamAttrTable` at $FEE6-$FF1C; and `TextTileData` at $F5D8 (font tile indices decoding to PLAYER, GAME OVER, READY, SOLVALOU, LEFT, PAUSE)
|
||
- **Residue:** 20,313 bytes (62.0%) remain `.byte` data (pattern/graphics data at $8000-$A2BF, sprite attribute table at $BB55-$BEFA, streams at $ACFB-$B8AA, and miscellaneous small regions). Six CDL-silent raw call operands remain and five regions (`Sub_C626`, `$D24B`, `Sub_D61B`, `Sub_D63E`, `Sub_EA9F`) still decode as code although their bytes form tables; both are documented in the project README. Six addresses contain undocumented/illegal opcodes not decoded by the tracer: $9848, $A2C3, $CD89, $E0FF, $E3B5, $F230
|
||
- **Details:** `Xevious (U)/README.md`
|
||
|
||
### 38. Zanac (U)
|
||
- **Folder:** `UNROM/Zanac (U)/` (promoted out of `_wip/UNROM/Zanac (U)/`)
|
||
- **ROM:** `Zanac (U).nes` (131,072 bytes)
|
||
- **Source:** `prg.s` + `prg.07.s` (Pass 3; bank 7 traced with 391 labels, banks 0-6 as raw data)
|
||
- **Linker:** HEADER at $0000, PRG at $0010-$1C000, PRG7 at $1C010-$20000
|
||
- **Vectors:** NMI → $CE8D (`NmiHandler`), RESET → $E7BF (`Reset`), IRQ → $CEC4 (`IrqHandler`)
|
||
- **Key subsystems:** NMI-driven frame loop with OAM DMA, PPU scroll/control latch, controller reading with shift register on $4016/$4017; vertical scrolling shooter with attract mode; object iteration, movement and drawing; sprite attribute packing into OAM
|
||
- **Build fix:** none at PRG level — it was PRG-identical in `_wip/` and stayed byte-identical through Pass 3. Promotion added `header.s`, `chr.s`, a HEADER/PRG/PRG7 `linker.cfg`, the `rom.nes` symlink and the whole-ROM `cmp`
|
||
- **Pass 1 correction:** static trace from vectors reached only 37.9% of bank 7. Banks 0-6 remain as raw `.byte` data pending bank-switch analysis
|
||
- **Residue:** ~65.5% of bank 7 remains `.byte` data. Seven addresses contain undocumented/illegal opcodes not decoded by the tracer: $D506, $D876, $E15B, $E44B, $E520, $E909, $F0FE
|
||
- **Details:** `Zanac (U)/README.md`
|
||
|
||
### 39. Volleyball (U)
|
||
- **Folder:** `NROM/Volleyball (U)/` (promoted out of `_wip/NROM/Volleyball (U)/`)
|
||
- **ROM:** `Volleyball (U).nes` (40,976 bytes)
|
||
- **Source:** `prg.s` (Pass 3; 1,989 labels, all semantic — 730 read out of the code by hand, 1,221 internal branch targets derived mechanically)
|
||
- **Linker:** HEADER at $0000, PRG at $8000-$FFFF, CHR at $0000-$1FFF
|
||
- **Vectors:** NMI → $8053 (`NmiHandler`), RESET → $8000 (`Reset`), IRQ → $FFFF (not a handler — the last byte of the PRG image; the APU frame counter is never IRQ-enabled)
|
||
- **Key subsystems:** the whole game runs from the NMI handler — the main loop at $81B5 only re-arms $DF and refreshes eight zero-page bytes. OAM shadow at $03FF uploaded by DMA, a VRAM update-script interpreter driven from a four-byte command block at $05C0-$05C3, controller reading with a shift register on $4016/$4017, a per-frame crowd animation, and an eleven-entry game-state dispatch table at $85E1 keyed by `GameState` ($2B) and `GameSubState` ($2C)
|
||
- **Build fix:** none — it was whole-ROM byte-identical in `_wip/` and stayed that way through Pass 3. Promotion was `git mv` plus the doc updates
|
||
- **Pass 1 correction:** the static trace reached only 66% of the PRG image. Declaring the game-state dispatch table (`--table 85E1:11`) plus a Mesen Code Data Logger capture taken while a random-input bot played the attract demo promoted 1,757 further bytes from data to code, reaching 73.0% (11,395 instructions / 23,926 code bytes, 8,842 data bytes, 0 unclassified)
|
||
- **Verification:** `_tools/cdl_check.py` cross-checks the finished `prg.s` against the CDL — 0 CDL-code bytes not covered by an instruction and 0 CDL-data bytes that start one. `apply_symbols.py --report` reports 0 residue; `align_audit_comments.py` reports no column drift
|
||
- **Residue:** the ten copies of the per-nation player-movement and ball routines are named by their position in the ROM, not mapped to the ten selectable nations — the copies differ only in a few constants, so the mapping would need a per-copy behavioural trace. `BallHitOffsetTable` and the speed tables hold values whose exact meaning is still inferred from the surrounding code
|
||
- **Details:** `Volleyball (U)/README.md`
|
||
|
||
## `_wip/` Projects
|
||
|
||
The pre-promotion tier is documented in **`WIP.md`**. It now holds **851
|
||
projects** across **29 mapper folders**:
|
||
|
||
| Folder | Mapper | Projects |
|
||
|--------|--------|----------|
|
||
| `_wip/NROM/` | 0 | 35 |
|
||
| `_wip/MMC1/` | 1 | 221 |
|
||
| `_wip/UNROM/` | 2 | 97 |
|
||
| `_wip/CNROM/` | 3 | 57 |
|
||
| `_wip/MMC3/` | 4 | 239 |
|
||
| `_wip/MMC5/` | 5 | 10 |
|
||
| `_wip/MAPPER7/` … `_wip/MAPPER232/` | 7-232 | 192 |
|
||
|
||
All 851 build **byte-identical for the whole ROM** — the tier was moved off
|
||
the old PRG-level-only compare on 2026-10-20, so the header and CHR are now
|
||
proven for every project here, exactly as in the promoted tier. **All 851 of
|
||
them are Pass 0 skeletons**: the folder shape and the build are proven, but
|
||
`prg.s` is still a single `.incbin "prg.bin"`. `Volleyball (U)` was the last
|
||
project to leave the tier with a full disassembly: Pass 1 + Pass 2 + Pass 3,
|
||
promoted to `NROM/Volleyball (U)` on 2026-10-21; `Golf (JU)` and `World Class
|
||
Track Meet (U)` followed on 2026-10-21, promoted to `NROM/Golf (JU)/` and
|
||
`CNROM/World Class Track Meet (U)/` respectively.
|
||
|
||
Two things are worth knowing before touching a `_wip/` project:
|
||
|
||
- **Most of the tier is a banked mapper with a PRG image larger than the
|
||
6502's address space.** Only two projects have a 16 KB PRG; 149 have
|
||
32 KB, 522 have 128 KB and one (`Action 52 (U) [!]`) has 1.5 MB. Those
|
||
projects link their MEMORY areas at *file offsets* rather than CPU
|
||
addresses, which is both the only option and the honest model. See
|
||
"Two linker layouts" in `WIP.md`.
|
||
- **226 projects have no CHR at all** — the mapper supplies CHR RAM.
|
||
|
||
The tier is deliberately **not** built by the root `Makefile`'s `all`/`clean`/
|
||
`<MAPPER>` targets — `MAPPERS` names only the promoted mapper folders. The
|
||
pre-promotion tier has its own explicit targets:
|
||
|
||
```
|
||
make wip # build + verify every _wip/<MAPPER>/<Project>/
|
||
make wipclean # clean the build artifacts in the tier
|
||
```
|
||
|
||
Both are driven by `WIP := _wip` at the top of the root `Makefile`; without
|
||
that variable the loop expands to `for m in /*/`, which walks the filesystem
|
||
root instead of the tier.
|
||
|
||
(The old manual loop, `for d in _wip/*/*/; do make -C "$d"; done`, still works
|
||
as an equivalent.)
|
||
|
||
Promotion is now just `git mv` plus the disassembly work: the whole-ROM
|
||
build, the `header.s`/`chr.s` sources, the HEADER/PRG/CHR `linker.cfg` and
|
||
the `rom.nes` copy are already in place. No `_tools` path change is needed,
|
||
because both tiers sit two levels deep, so `../../_tools/` is correct either
|
||
way. `Lunar Pool (U)`, `Donkey Kong (JU)`, `Popeye (JU) (PRG 1)`,
|
||
`Raid on Bungeling Bay (U)`, `Pac-Man (U)`, `Raid on Bungeling Bay (U) [a2]`,
|
||
`Pac-Man (Tengen) (U)`, `Pyramid (U) (Sachen)`, `Hogan's Alley (JU)` and
|
||
`Mario Bros (JU)` (all 2026-10-20) went through exactly that and came out
|
||
whole-ROM byte-identical on the first promoted build. `Xevious (U)` and
|
||
`Zanac (U)` followed on 2026-10-20, `Mermaids of Atlantis (U)` on 2026-10-20,
|
||
and `Volleyball (U)` on 2026-10-21.
|
||
|
||
**`git mv` only moves the tracked files**, so the old `_wip/` folder survives
|
||
with its untracked build artifacts (`*.o`, `reconstructed.nes`,
|
||
`reconstructed.lbl`, `reconstructed.map`) and sometimes with a stale
|
||
`README.md` left behind. Delete the leftover folder — otherwise it counts as
|
||
a project in every tier tally while having no source to build. `Xevious (U)`
|
||
and `Zanac (U)` both left one behind on 2026-10-20; both were cleaned up on
|
||
2026-10-21.
|
||
|
||
Notable vector/header observations for Pass 1 work:
|
||
- **Pac-Man (U)** RESET at `$FF00` — the vector-page tail, but **not** padding: `$FF00` holds real boot code (`sei`/`cld`, PPU off, double vblank wait, `jmp ColdStart` at `$C042`). The **Tengen variant** RESETs at `$C033` and has no boot code at `$FF00` at all (that region is `$FF` padding) — the same boot sequence is inline at `$C033`. The two PRGs differ in 56 bytes in 8 runs, all of them code-versus-licensee-text.
|
||
- **Lunar Pool (U)** NMI `$FF65` / IRQ `$FF64` are adjacent in the vector page; RESET `$E80C`.
|
||
- **NES PowerPad Test Card (U)** — *at Pass 2/3*: minimal code (~7.2%), data-heavy test cartridge. RESET at $E000 (non-$C000 entry). NMI handler reads controllers via shift register, processes pad transitions, draws score/lives. See `NES PowerPad Test Card (U)/README.md`.
|
||
- **Lunar Pool (U)** — *Pass 2 and Pass 3 complete; promoted to the top level 2026-10-18*: RESET at `$E80C` (not `$C000`), NMI `$FF65`, IRQ `$FF64` (a bare `rti` just before the NMI handler, so IRQs are ignored). There is **no** `jmp ($7961)` RAM-pointer gate (an earlier claim): those three sites fell out of decoding two bytes into the word "player". `$CBDC`/`$CBC9` is a print-inline-string-and-return-after-it helper, so a `jsr $CBDC` is always followed by a `$81`-prefixed, `$00`-terminated string ("player", "shot", "game over", "hi`score__", "perfect_"). The split was re-derived from a Mesen CDL capture (10,028 bytes Code): now **5,300 instructions / 11,077 bytes (67.6%)**, 5,301 data bytes and the six vector bytes as `.word`. Pass 2 named all **705** labels — `Label_<addr>` is gone from the file — and Pass 3 named 33 tables plus the zero-page aliases (38 semantic, 66 neutral, ten former phantom aliases deleted). Residue, recorded rather than guessed: 73 bytes of *reachable* code are still `.byte` (`$EA9A`, `$EADC`, `$EAE5`, `$EAED`, `$EB04`, `$EB16-$EB4F` — the CDL capture never fetched them), another 75 bytes of ending-screen code sit at `$F5F9-$F643`, and ~206 bytes of unreached-but-clearly-code stubs stay data. The full 24,592-byte ROM (header + PRG + CHR) rebuilds byte-identically. See `Lunar Pool (U)/README.md`.
|
||
- **Ice Climber (JE) vs (U)**: byte-identical PRG *and* header — only the CHR differs (~regional title graphic).
|
||
- **Popeye (JU) PRG 0 vs PRG 1**: different PRG binaries (and mirroring); same vectors.
|
||
- **Raid on Bungeling Bay (U) vs [a2]**: `[a2]` differs in mirroring only per header, but PRGs differ — separate builds.
|
||
- **Pyramid (U)** (Sachen) — *promoted 2026-10-20*: the unlicensed Sachen boot pokes a mapper unlock at `$4100`, checks the RAM bytes `$0120`/`$0121` against "A"/"V", and dispatches through two queued-event tables with `jmp ($0002)`. It also dispatches through `jmp` trampoline tables that live *inside* the data regions — 828 bytes of code that the tracer could not reach were recovered by hand. See `NROM/Pyramid (U) (Sachen)/README.md`.
|
||
- **CIRCUS** — *at Pass 2/3*: full recursive disassembly complete. NMI-driven frame state machine (main loop is a spin loop at $C057). Menu text at $C763 ("CONTINUE", "STAGE", "SELECT", "PLAY"). Object state machine at $DC3F–$FE7B. Audio sequence data at $FABB–$FFFB. See `CIRCUS/README.md`.
|
||
- **Mermaids of Atlantis (U)** — *promoted 2026-10-20, rebuilt 2026-10-21*: mapper 8 (MMC3) with 64 KB of PRG, so the PRG is eight 8 KB banks and two of them can be visible at the same CPU address. The image carries the reset stub **and the vector table twice**: at file `$7FFA` (the fixed bank) the NMI vector is `$808F` — that is the live one, and `$808F` is the frame handler — while the copy at file `$FFFA` names `$8189`, which is a `BRK` in the first half of the image. The fixed bank is the *fourth* 8 KB bank (`$6000-$7FFF`), not the last one, which is why the game's text table lives at CPU `$F1D6`: that is the fixed window, and the code reads it there. Mesen maps the fixed bank the same way, and the dump's own code is what settles it. The disassembly therefore has one segment per bank (`PRG0`..`PRG7`), each with its own `.org` for the CPU window, and banks 4 to 7 carry a `Bank4_`..`Bank7_` label prefix. See `MAPPER8/Mermaids of Atlantis (U)/README.md`.
|
||
- **Joypad Test Cartridge (U)** — *Pass 3 complete*: minimal code (23.4%), data-heavy test cartridge. Data region `$CF06–$FFFF` broken into 20 named sub-blocks; VRAM command stream opcode set decoded via `RetAddrUpdate` return-address modification trick at `$CDC8`. See `Joypad Test Cartridge (U)/README.md`.
|
||
- **Wild Gunman (U)** — *Pass 1 redone, Pass 2/3 complete*: NMI-driven frame loop. Gates its code behind runtime computed-goto tables — see the `prg.s` header block and its `README.md`.
|
||
- **Mario Bros (JU)** — *Pass 1 corrected, Pass 2/3 complete, promoted 2026-10-20*: the engine's handler tables sit **inline**, right after the `jsr` that reads them, so the static tracer could not follow them. A Mesen Code Data Logger capture showed 1,067 bytes the tracer had left as data were code, taking the split from 72.0% to 78.4%. Pass 2 named every label (zero `Label_`, zero `SubC`) and Pass 3 added 25 semantic zero-page aliases and named 35 data tables. Code is gated behind stack-based indirect dispatch at `$CD9E` and a 20-entry `JSR` thunk table at `$C5A3`. Audio routines in `$F8xx-$F9xx` clearly identifiable from APU register writes. See `NROM/Mario Bros (JU)/README.md`.
|
||
|
||
## Common Patterns Across All Projects
|
||
|
||
### Memory Map
|
||
Every project uses a single 16 KB PRG bank mapped at CPU **$C000–$FFFF**, with 8 KB CHR. All builds are NROM (no bank switching).
|
||
|
||
### Interrupt Structure
|
||
All projects follow the same NES interrupt pattern:
|
||
- **NMI** fires once per frame and is the real-time heartbeat — handles OAM DMA, PPU updates, controller reading, and audio.
|
||
- **RESET** performs cold-start hardware init, RAM clearing, and enters the main loop.
|
||
- **IRQ** is almost always unused (either `rti` or a self-loop).
|
||
|
||
Two exceptions worth noting from branches of this family:
|
||
- **Excitebike** uses a state-dispatch table at $C000 rather than a conventional inline main loop, and its IRQ vector points into a data region (unused).
|
||
- **Donkey Kong Jr.** is the extreme case: its reset path idles forever in a PRNG-advance loop, and the *entire* frame state machine (title, attract, gameplay, sound) executes inside the NMI handler itself. Its reset entry is also at $C66E rather than $C000.
|
||
|
||
### Build Toolchain
|
||
All projects use the same toolchain:
|
||
- **ca65** (6502 assembler)
|
||
- **ld65** (linker with `.cfg` memory map)
|
||
- All rebuilds are verified **byte-identical** to the original `prg.bin` / ROM PRG bank.
|
||
|
||
### Disassembly Style
|
||
All sources are "Pass-1" style disassemblies:
|
||
- Every instruction annotated with PRG offset, CPU address, and emitted bytes
|
||
- Inline `.byte`/`.word`/`.res` data blocks interleaved with code
|
||
- Address-based labels where semantics are not yet resolved: `Label_Cxxxx` (unrenamed internal targets), `SubC<addr>` / `Sub_Cxxxx` (unnamed entry points), `<Routine>_Block[_n]` (internal blocks under a named parent routine)
|
||
- Zero-page symbol files (`locals.inc`) and hardware symbol files (`symbols.inc`)
|
||
|
||
---
|
||
|
||
## Navigation
|
||
|
||
Each project is a flat folder under its mapper directory — e.g.
|
||
`NROM/Balloon Fight (JU)/` — containing:
|
||
- `prg.s` — disassembly source; `header.s`, `chr.s` and the raw `header.bin` / `chr.bin` / `prg.bin` splits (where present)
|
||
- `symbols.inc`, `locals.inc` — hardware constants and application symbols
|
||
- `linker.cfg`, `Makefile` — memory map and build script
|
||
- `rom.nes` — space-free copy/symlink of the original ROM used by the compare
|
||
- `README.md` — detailed per-project power-on execution flow analysis
|
||
|
||
To rebuild any one project:
|
||
```bash
|
||
cd /home/tmerritt/Projects/disasm/NROM/<Project>
|
||
make
|
||
```
|
||
|
||
To build and verify every project at once (all mapper directories):
|
||
```bash
|
||
cd /home/tmerritt/Projects/disasm
|
||
make # all projects, all mappers
|
||
make clean # clean them all
|
||
make MMC3 # one mapper tier only
|
||
make wip # the pre-promotion tier under _wip/
|
||
```
|
||
|
||
The root `Makefile` covers the **promoted** tier only — `make`, `make clean`
|
||
and `make <MAPPER>` never touch `_wip/`. The pre-promotion tier under `_wip/`
|
||
is built explicitly with `make wip` (and cleaned with `make wipclean`):
|
||
```bash
|
||
for d in _wip/*/*/; do make -C "$d"; done # equivalent manual loop
|
||
```
|
||
See `WIP.md` for the `_wip/` tier's layout, its quirks and its open work.
|
||
|
||
---
|
||
|
||
## Pass 1 methodology note (2026-10-16)
|
||
|
||
The original Pass 1 disassembler had two limitations that silently understated
|
||
code coverage. Both are worth knowing before trusting a coverage percentage:
|
||
|
||
1. **Documented opcodes only.** Its table held the 151 documented 6502 opcodes.
|
||
These ROMs also use the 54 undocumented opcodes and the 26 unofficial NOPs
|
||
as 2/3-byte padding; a tracer that halts on them strands the real code behind.
|
||
2. **No runtime dispatch.** It followed only vectors and direct `jsr`/`jmp`/branch
|
||
targets. Games here dispatch through computed jumps — `jmp ($0014)`, the
|
||
`pla`-based inline-table gotos in Wild Gunman (`Label_C341`), and task tables
|
||
like Donkey Kong Jr.'s `DeferredTaskHandlerTable` at $BFFE.
|
||
|
||
Effect measured per project (old tracer → complete-opcode dispatch-aware tracer):
|
||
|
||
| Project | Old | Complete | Action taken |
|
||
|---------|-----|----------|--------------|
|
||
| NES PowerPad Test Card (U) | 546 instr | 559 | Pass 1 already sound |
|
||
| Joypad Test Cartridge (U) | 282 instr | **1,773** | Pass 1 redone (23.4% code); Pass 2 complete; Pass 3 complete |
|
||
| Wild Gunman (U) | 1,600 instr | **4,083** | Pass 1 redone (49.3% code) |
|
||
| Balloon Fight (JU) | 5,216 instr | 5,277 | hand-done file was already better |
|
||
| Donkey Kong Jr. (JU) | 6,135 instr | 6,135 | file already complete |
|
||
|
||
**Joypad Test Cartridge (U) was the last project carrying the old, truncated
|
||
Pass 1, and has now been redone.** Its recorded "3.5% code" was really 23.4%: the
|
||
tracer stopped at `$C09E` on `DCP $3C20` (`$CF`), an undocumented opcode used as
|
||
ordinary code, and 3,256 bytes of real code were filed as `.byte` data. Redoing it
|
||
also invalidated its Pass 3, which had described `$C09E–$C173` and `$C17F–$CCF6` as
|
||
data — both are code. Pass 3 is now the outstanding work.
|
||
|
||
The fix generalises: `nesdis.py --undocumented` decodes all 105 undocumented NMOS
|
||
opcodes. It is **default off** so that projects whose `prg.s` is already
|
||
regen-stable keep reproducing byte-for-byte under `make regen`.
|
||
|
||
`_tools/verify_pass1.py` checks the **top-level projects** — it selects the project
|
||
folders under each mapper directory (`NROM/`, `AOROM/`, `CNROM/`, `MMC1/`, `MMC3/`,
|
||
`MMC5/`, `UNROM/`) that carry a `Makefile` and a `prg.bin`/`rom.nes`, so `_wip/`
|
||
projects are not covered (they are checked by plain `make`, now at the
|
||
whole-ROM level).
|
||
Current run, 2026-10-20: all 35 `NROM/` projects build, **all canonical**, and
|
||
**no truncated or unfaithful Pass 1**. The
|
||
last two carryovers are gone — Joypad Test Cartridge, the last project holding an
|
||
old truncated Pass 1, was redone, and Excitebike, the last source with uncommented
|
||
instructions, was commented.
|
||
|
||
The comment-spelling report used to claim that **no project follows the canonical
|
||
`; CPU:$xxxx PRG:xxxx AA BB` convention**. That was a bug in the checker, not a fact
|
||
about the sources: the `canonical` pattern ends with `$` but was compiled without
|
||
`re.MULTILINE`, so it could only ever match once — at end of file — and every
|
||
project fell through to whichever laxer spelling matched most lines. Fixed with
|
||
`re.M`, the true split was 8 canonical / 3 `pipe` / 2 `short` / `rom` / `bytes` /
|
||
`colon` / `slash`; the 2026-10-19 standardization (`_tools/audit_comment_tool.py`
|
||
over 9 projects, plus hand fixes to CIRCUS and Excitebike) closed it out, so the
|
||
checker now reports **all canonical**.
|
||
|
||
Inside `_wip/`, none of the 851 projects have instructions to comment at all —
|
||
they are all Pass 0 skeletons. (`Golf (JU)` and `World Class Track Meet (U)`
|
||
used to be the two exceptions, but both were promoted on 2026-10-21 and their
|
||
comments are canonical.)
|
||
(`Xevious (U)`, which used to be the second project in the tier with
|
||
instructions, was promoted to `NROM/` on 2026-10-20.)
|
||
|
||
The old claim that "Excitebike and Pac-Man carry no byte comments at all" is stale
|
||
on both counts. Pac-Man (USA) (Namco) is complete (4,695/4,695 instructions
|
||
commented), and Excitebike's 1,013-line gap was closed on 2026-10-19 — all 5,376
|
||
instruction lines now carry a canonical comment.
|
||
|
||
The earlier-reported re-trace crash on `MUSCLE (U)` / `Donkey Kong Jr. (JU)`
|
||
(`ValueError: invalid literal for int() with base 16: ':$0010'`) was a false alarm:
|
||
`nesdis.operand_value()` already strips the emitter's `a:` prefix via
|
||
`token.removeprefix("a:").lstrip("$")`, so re-tracing all promoted projects is
|
||
clean.
|
||
|
||
### Resolved — audit comments for Excitebike and Pac-Man (2026-10-19)
|
||
|
||
Both were hand-written sources with semantic labels but no byte-identity audit
|
||
trail. Both now carry canonical `; CPU:$xxxx PRG:xxxx AA BB` comments on every
|
||
instruction, and `verify_pass1.py` reports all-canonical across the top level, so
|
||
this section is closed.
|
||
|
||
The `ca65 -l` listing route described here was abandoned, for the reason recorded
|
||
in `AGENTS.md`: the listing carries no source line numbers, so entries cannot be
|
||
keyed back to source lines. The comment tooling went through the tracer instead
|
||
(`_tools/audit_comment_tool.py`, tracer as ground truth). The invariant still
|
||
holds and is the check to keep: after inserting comments, `make` must still print
|
||
`Byte-identical ROM verified.`, and each comment's byte list must match `prg.bin`
|
||
at the stated offset — a wrong offset that still assembles is the failure mode.
|
||
|
||
---
|
||
|
||
## Summary
|
||
|
||
Thirty-nine projects sit under `NROM/`, and all 39 rebuild **byte-identical**
|
||
to their original ROMs (rows 1-27 below plus row 29 `Hogan's Alley (JU)`,
|
||
row 30 `Mario Bros (JU)`, row 31 `Pac-Man (Tengen) (U)`, row 32 `Pac-Man (U)`,
|
||
row 33 `Pyramid (U) (Sachen)`, rows 34 and 35 `Raid on Bungeling Bay (U)` and
|
||
`Raid on Bungeling Bay (U) [a2]` — all promoted 2026-10-20 — and rows 36
|
||
and 37 (Urban Champion and Xevious (U)) which kept their tail numbers when
|
||
they were promoted; row 7 `Excitebike (JU)` was fixed on 2026-10-20 — the
|
||
byte-596 mismatch was two `$0A`/`$11` PPU-mask-shadow operands, see
|
||
`NROM/Excitebike (JU)/README.md`).
|
||
|
||
The pre-promotion tier holds **851 projects** under `_wip/`, and as of
|
||
2026-10-21 all 851 verify **byte-identical for the whole ROM** as well
|
||
(`make wip` builds and verifies the whole tier: 851 of 851 passed, 0
|
||
failures). None of the 851 carry a real disassembly — they are all Pass 0
|
||
skeletons; `Golf (JU)` (row 28) and `World Class Track Meet (U)` (row 41)
|
||
were promoted from this tier on 2026-10-21. The whole tier — its layout, its
|
||
quirks and its open work — is documented in **`WIP.md`**. Folder *locations*
|
||
changed on 2026-10-20 (mapper directories, flat project folders),
|
||
but each row's build-status claim in this table is the state at its own
|
||
promotion; verify against the tree with `make` if in doubt.
|
||
|
||
| # | Project | Build Status | Pass 3 |
|
||
|---| --------- | -------------- | -------- |
|
||
| 1 | Balloon Fight (JU) | BYTE-IDENTICAL | complete; symbols applied 2026-10-19 (16 `$13` operands left numeric) |
|
||
| 2 | Baseball (UE) | BYTE-IDENTICAL | complete; symbols applied 2026-10-19 (121 operands) |
|
||
| 3 | Bomberman (U) | BYTE-IDENTICAL | complete |
|
||
| 4 | Burger Time (U) | BYTE-IDENTICAL | complete |
|
||
| 5 | Clu Clu Land (JU) | BYTE-IDENTICAL | complete |
|
||
| 6 | Defender 2 (U) | BYTE-IDENTICAL | complete |
|
||
| 7 | Excitebike (JU) | BYTE-IDENTICAL | complete (Pass 2/3 complete); byte-596 `$0A`/`$11` mask-shadow fix + audit-trail re-anchor + 58 `jsr/jmp` operands symbolized 2026-10-20 |
|
||
| 8 | Tennis (JU) | BYTE-IDENTICAL | complete; symbols applied 2026-10-19 (18 operands) |
|
||
| 9 | Pac-Man (USA) (Namco) | BYTE-IDENTICAL | complete; symbols applied 2026-10-19 (524 operands; 727 multi-alias residues) |
|
||
| 10 | Donkey Kong 3 (JUE) | BYTE-IDENTICAL | complete |
|
||
| 11 | Donkey Kong Jr. (JU) | BYTE-IDENTICAL | complete (Pass 1 verified) |
|
||
| 12 | CIRCUS | BYTE-IDENTICAL | complete; symbols applied 2026-10-19 (118 operands; 23 multi-alias residues) |
|
||
| 13 | Wild Gunman (U) | BYTE-IDENTICAL | complete (Pass 1 redone); symbols applied 2026-10-19 (76 operands) |
|
||
| 14 | Joypad Test Cartridge (U) | BYTE-IDENTICAL | Pass 3 complete; symbols applied 2026-10-19 (47 operands) |
|
||
| 15 | NES PowerPad Test Card (U) | BYTE-IDENTICAL | complete; symbols applied 2026-10-19 (89 operands) |
|
||
| 16 | MUSCLE (U) | BYTE-IDENTICAL | complete; symbols applied 2026-10-19 (220 operands) |
|
||
| 17 | Lunar Pool (U) | BYTE-IDENTICAL | complete (tables named); symbols applied 2026-10-19 (45 operands) |
|
||
| 18 | Donkey Kong (JU) | BYTE-IDENTICAL | complete (Pass 2/3, promoted 2026-10-19); symbols applied 2026-10-19 (75 operands) |
|
||
| 19 | Donkey Kong Jr. Math (U) | BYTE-IDENTICAL | complete (Pass 3 complete); promoted into `NROM/` 2026-10-20 after fixing the mislabeled `SubCF218` call sites |
|
||
| 20 | Duck Hunt (JUE) | BYTE-IDENTICAL | complete (Pass 3 complete) |
|
||
| 21 | Ice Climber (JE) | BYTE-IDENTICAL | complete (Pass 3 complete) |
|
||
| 22 | Ice Climber (U) | BYTE-IDENTICAL | complete (Pass 3 complete) |
|
||
| 23 | Lode Runner (U) | BYTE-IDENTICAL | complete (Pass 2/3 complete) |
|
||
| 24 | Pinball (JU) | BYTE-IDENTICAL | complete (Pass 2/3 complete) |
|
||
| 25 | Millipede (U) | BYTE-IDENTICAL | complete (Pass 2/3 complete, 74.6% code) |
|
||
| 26 | Popeye (JU) (PRG 0) | BYTE-IDENTICAL | complete (Pass 2/3 complete, 72.3% code) |
|
||
| 27 | Popeye (JU) (PRG 1) | BYTE-IDENTICAL | complete (Pass 2/3 complete, 72.3% code); promoted 2026-10-20 |
|
||
| 28 | Golf (JU) | BYTE-IDENTICAL | complete (Pass 1+2+3 complete; promoted from `_wip` 2026-10-21; 4,217 instructions / 13,541 lines; 0 residue) |
|
||
| 31 | Pac-Man (Tengen) (U) | BYTE-IDENTICAL | partial (Pass 2 complete, Pass 3 partial — 30 zero-page aliases, 28 named data tables, 0 residue, 20.0% code); promoted 2026-10-20 |
|
||
| 32 | Pac-Man (U) | BYTE-IDENTICAL | partial (Pass 2 complete, Pass 3 partial — 119 operands, 0 residue); promoted 2026-10-20 |
|
||
| 34 | Raid on Bungeling Bay (U) | BYTE-IDENTICAL | partial (Pass 2/3 partial, 64.6% code); promoted 2026-10-20 |
|
||
| 33 | Pyramid (U) (Sachen) | BYTE-IDENTICAL | partial (Pass 2 complete, Pass 3 partial — 24 zero-page aliases, 32 named data tables, 0 residue, 39.6% code); promoted 2026-10-20 |
|
||
| 35 | Raid on Bungeling Bay (U) [a2] | BYTE-IDENTICAL | partial (Pass 2 complete, Pass 3 partial — 15 zero-page aliases, 0 residue, 64.3% code); promoted 2026-10-20 |
|
||
| 30 | Mario Bros (JU) | BYTE-IDENTICAL | partial (Pass 2 complete, Pass 3 partial — 25 zero-page aliases, 35 named data tables, 0 residue, 78.4% code); promoted 2026-10-20 |
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| 29 | Hogan's Alley (JU) | BYTE-IDENTICAL | partial (Pass 2 complete, Pass 3 partial — 60 semantic zero-page aliases, 34 named data tables, 0 residue, 49.1% code); promoted 2026-10-20 |
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| 36 | Urban Champion (JU) | BYTE-IDENTICAL | complete; symbols applied 2026-10-19 (70 operands) |
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| 37 | Xevious (U) | BYTE-IDENTICAL | complete (Pass 3 complete, 38.0% code; 143 semantic entry points, 32 named data tables, ~20 semantic ZP aliases; split corrected from Mesen CDL 2026-10-21) |
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| 38 | Zanac (U) | BYTE-IDENTICAL | complete (Pass 3 complete, 34.5% code; 133 semantic entry points, 26 named data tables, 14 semantic ZP aliases) |
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| 39 | Volleyball (U) | BYTE-IDENTICAL | complete (Pass 3 complete, 73.0% code; 1,989 semantic labels, 37 named data blocks, 0 residue; promoted 2026-10-21) |
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| 40 | Mermaids of Atlantis (U) | BYTE-IDENTICAL | mapper 8; Pass 3 complete (12.3% code, 494 named routines, 13 semantic zero-page aliases; 8 banked segments; rebuilt 2026-10-21) |
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| 41 | World Class Track Meet (U) | BYTE-IDENTICAL | complete (Pass 1+2+3 complete; promoted from `_wip` 2026-10-21; 8,400 instructions / 18,028 code bytes, 55.0% code; 24 semantic ZP aliases, 78 neutral ZpXX with reasons; 0 residue) |
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Row 28 (`Golf (JU)`, now promoted to `NROM/Golf (JU)/`) rebuilds byte-identical
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at the whole-ROM level. Row 41 (`World Class Track Meet (U)`, now promoted to
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`CNROM/World Class Track Meet (U)/`) rebuilds byte-identical as well. The other
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851 `_wip/` projects are Pass 0 skeletons and need Pass 1 from scratch.
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See **`WIP.md`**.
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Use `_tools/verify_pass1.py` to re-check any of this at any time; it rebuilds each
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project and re-traces it, and reports `TRUNCATED` when a project's committed split
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claims less code than the tracer can reach.
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