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tmerritt 0a49ee6da7 Pass 2 _wip: Slalom (U), Kung Fu (U), Othello (U) label replacement complete

Pass 3 _wip: Slalom (U), Kung Fu (U), Othello (U) semantic naming complete
Pass 3 _wip: apply symbols (0 residue) for Slalom (U), Kung Fu (U), Othello (U)
Pass 2/3 _wip: 10 NROM projects (Elevator Action, 1942, Tag Team Wrestling, Galaga, Kung Fu a1, Stack-Up, Magmax, Ms Pac-Man Namco, Soccer, Sqoon)
Promote 13 _wip/NROM projects to NROM/ (Slalom, Kung Fu, Othello, Elevator Action, 1942, Tag Team Wrestling, Galaga, Kung Fu a1, Stack-Up, Magmax, Ms Pac-Man Namco, Soccer, Sqoon)
Pass 2/3 _wip: 5 CNROM games (Tiger-Heli, Paperboy, Last Starfighter, Mighty Bomb Jack, Kung-Fu Heroes)
Docs: document CDL capture + re-trace workflow in TODO.md
Adds more code for
 - Elevator Action (U)
 - Kung Fu (U)
 - Othello (U)
 - Slalom (U)
 - Sqoon (U)

2026-10-21 14:42:00 -04:00

2.0 KiB

Raw Blame History

Stack-Up (JU)

Status

Pass 3. All address-derived Label_XXXX definitions replaced; every jsr/jmp operand symbolic; hardware-register operands resolved via apply_symbols.py (0 residue); audit comments aligned; make stays byte-identical.

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	0
Board	NROM-256
Mirroring	Horizontal
Four-screen VRAM	no
Battery	no
PRG	32 KB (2 x 16 KB), mapped at CPU $8000-$FFFF
CHR	8 KB (1 x 8 KB)
Trainer	none
Footer	none
NMI vector	$81AD
RESET vector	$8100
IRQ vector	$81E6
ROM file	`Stack-Up (JU).nes`
SHA-256	`3ab6bc99246783a6bf7083481027fe358ccdb147dcf1165eaf08aaf4e1b06548`

Header notes

none

Open work

Pass 1 - run nesdis.py over prg.bin to produce the code/data split. The tracer reads the vectors from the last six bytes of the PRG image, so the split seeds correctly.
Pass 1 must emit the canonical audit comment ; CPU:$C123 PRG:0123 AD 21 03 at column 35 for every instruction.
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 0 PRG include (replaced by the Pass 1 disassembly)
`header.s`	iNES header include
`chr.s`	CHR include
`prg.bin`	32768 bytes (32 KB) PRG image
`chr.bin`	8192 bytes (8 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 (empty at Pass 0)
`Makefile`	build and byte-identity check

2.0 KiB Raw Blame History