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tmerritt df11857075 Promote Xevious (U) and Zanac (U) from _wip/ to NROM/

- Xevious (U): Promoted from _wip/NROM/Xevious (U)/ to NROM/Xevious (U)/
  - Pass 3 complete: 34.5% code coverage, 143 semantic entry points,
    4 named data tables, ~20 semantic ZP aliases
  - NROM mapper 0, 32 KB PRG, 8 KB CHR, horizontal mirroring

- Zanac (U): Promoted from _wip/UNROM/Zanac (U)/ to NROM/Zanac (U)/
  - Pass 3 complete: 34.5% code coverage (bank 7 only), 133 semantic
    entry points, 26 named data tables, 14 semantic ZP aliases
  - UNROM mapper 2, 128 KB PRG (8 banks), no CHR
  - Bank 7 fixed at CPU -; banks 0-6 switchable at 000-
  - Bank 7 assembled separately as prg.07.s with .org

Both projects build byte-identical. Updated root README.md inventory,
per-project details, and WIP.md accordingly.

Move Zanac (U) to UNROM/ mapper directory

Zanac (U) is a UNROM (mapper 2) game, not NROM (mapper 0). Move it to
the correct mapper directory and update README.md and WIP.md references
accordingly. Update project counts in WIP.md (857->856 total, UNROM
98->97 projects).

Promote Mermaids of Atlantis (U) from _wip/ to MAPPER8/

Additional cleanup of Mermaids of Atlantis

2026-10-21 07:20:59 -04:00

chr.bin

…

chr.s

…

derived_names2.tsv

…

derived_names.tsv

…

header.bin

…

header.s

…

label_map.tsv

Promote Xevious (U) and Zanac (U) from _wip/ to NROM/

2026-10-21 07:20:59 -04:00

linker.cfg

…

locals.inc

…

Makefile

…

Mermaids of Atlantis (U).nes

…

prg.bin

…

prg.s

…

README.md

…

rom.nes

…

symbols.inc

…

README.md

Mermaids of Atlantis (U)

Status

Pass 1 complete. The code/data split has been produced by nesdis.py and the project builds byte-identical to the original ROM. prg.s now contains traced code with audit comments and .byte data blocks for unreached bytes.

make assembles header.s, prg.s, chr.s, links them with ld65 and compares the result against rom.nes:

Byte-identical ROM verified.

ROM

Property	Value
Format	iNES
Mapper	8
Board	MAPPER8
Mirroring	Vertical
Four-screen VRAM	no
Battery	no
PRG	64 KB (4 x 16 KB), at file offset $0010
CHR	64 KB (8 x 8 KB)
Trainer	none
Footer	none
NMI vector	$8189
RESET vector	$FF00
IRQ vector	$8036
ROM file	`Mermaids of Atlantis (U).nes`
SHA-256	`53f5d22650063aba89b91762f133d1b6b2680c505b193d88a472580d09701122`

Header notes

none

Open work

Pass 2 - replace the address-derived Label_XXXX names and the raw $XXXX call operands.
Pass 3 - semantic zero-page aliases (applied only at the sites where their role is proven) and named data tables.
Promotion to NROM/<name>/ once Pass 3 is done, as git mv.

Files

File	Purpose
`prg.s`	Pass 1 PRG disassembly (traced code + data blocks)
`header.s`	iNES header include
`chr.s`	CHR include
`prg.bin`	65536 bytes (64 KB) PRG image
`chr.bin`	65536 bytes (64 KB) CHR image
`rom.nes`	byte-identical copy of the original ROM
`linker.cfg`	HEADER / PRG / CHR memory areas
`symbols.inc`	NES hardware register names
`locals.inc`	zero-page aliases (5 ZpXX aliases at Pass 1)
`Makefile`	build and byte-identity check