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CDL re-trace: 1942 (JU) 46.6%, Galaga (U) 32.3% (Pass 2/3 complete)

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Pass 3 _wip: semantic ZP aliases for Sqoon (U) (FrameCounter, PpuCtrlShadow, NmiFrameFlag) and Elevator Action (U) (PpuCtrlShadow, NmiSaveA/X/Y)
Pass 3 Slalom (U): semantic ZP aliases (PpuCtrlShadow, PpuMaskShadow)
Pass 3 Kung Fu (U): semantic ZP alias (PpuCtrlShadow)
Pass 3 Othello (U): semantic ZP alias (PpuCtrlShadow)
Pass 3 1942 (JU): semantic ZP alias (PpuCtrlShadow)
Pass 3 Galaga (U): semantic ZP aliases (PpuCtrlShadow, PpuMaskShadow)
Docs: add power-on flow + data-table inventory to READMEs of 13 promoted NROM projects
Pass 3 Elevator Action (U): add NmiFrameFlag alias
Pass 3 Elevator Action (U): full ZP naming (23 aliases) + 25 named data tables, 59.4% coverage
Pass 1/2/3 re-trace: recover unreached code in 7 NROM projects (Sqoon 56.4%, Elevator Action 59.3%, Kung Fu 52.1%, 1942 52.1%)
Pass 3 Sqoon (U): full ZP naming (22 aliases) + 17 named data tables
Pass 3 Kung Fu (U): full ZP naming (21 aliases) + 13 named data tables
Pass 3 Othello (U): full ZP naming (18 aliases) + 27 named data tables
Pass 3 1942 (JU): full ZP naming (14 aliases) + 19 named data tables
Pass 3 Galaga (U): full ZP naming (15 aliases) + 14 named data tables
Pass 3 Slalom (U): full ZP naming (16 aliases) + 16 named data tables
Pass 2/3: re-apply naming to Slalom (U), Othello (U), Galaga (U) after re-seed
Pass 1/2/3 re-trace: recover unreached code in 6 more promoted NROM projects
Pass 3 Stack-Up (JU): full ZP naming (15 aliases) + 12 named data tables
Pass 3 Tag Team Wrestling (U): full ZP naming (20 aliases) + 11 named data tables
Pass 3 Kung Fu (U) (a1): full ZP naming (20 aliases) + 12 named data tables
Pass 3 Magmax (U): full ZP naming (18 aliases) + 6 named data tables
Pass 3 Soccer (JU): full ZP naming (18 aliases) + 9 named data tables
Pass 3 Ms Pac-Man (Namco) (U): full ZP naming (18 aliases) + 8 named data tables
Docs: refresh coverage numbers and data-table inventories for 13 promoted NROM projects
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NROM/Stack-Up (JU)/README.md
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## 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.
```
**Pass 3 complete; promoted.** `prg.s` is a traced disassembly with all
address-derived labels replaced, all `jsr`/`jmp` operands symbolic, hardware
registers named via `symbols.inc`, and `apply_symbols.py` reporting 0 residue.
Code coverage: 10,586 / 32,768 bytes (32.3%).
`make` assembles and verifies byte-identical to `rom.nes`.
## ROM
| Property | Value |
|----------|-------|
| Format | iNES |
| Mapper | 0 |
| Board | NROM-256 |
| Mapper | 0 (NROM) |
| PRG | 32 KB |
| CHR | 8 KB |
| 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
## Power-on flow
- none
RESET enters at `$8100`:
## Open work
cld ; CPU:$8100 PRG:0100 D8
sei ; CPU:$8101 PRG:0101 78
ldx #$00 ; CPU:$8102 PRG:0102 A2 00
stx PPUCTRL ; CPU:$8104 PRG:0104 8E 00 20
stx PPUMASK ; CPU:$8107 PRG:0107 8E 01 20
lda PPUSTATUS ; CPU:$810A PRG:010A AD 02 20
bpl Reset_OnNonnegative ; CPU:$810D PRG:010D 10 FB
dex ; CPU:$810F PRG:010F CA
txs ; CPU:$8110 PRG:0110 9A
ldx Zp2F ; CPU:$8111 PRG:0111 A6 2F
ldy #$07 ; CPU:$8113 PRG:0113 A0 07
sty Zp01 ; CPU:$8115 PRG:0115 84 01
- **Pass 1** - run `nesdis.py` over `prg.bin` to produce the code/data
split. The tracer reads the vectors from the last six bytes of the PRG
image, so the split seeds correctly.
- **Pass 1** must emit the canonical audit comment
`; CPU:$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`.
NMI handler at `$81AD`:
## Files
pha ; CPU:$81AD PRG:01AD 48
txa ; CPU:$81AE PRG:01AE 8A
pha ; CPU:$81AF PRG:01AF 48
tya ; CPU:$81B0 PRG:01B0 98
pha ; CPU:$81B1 PRG:01B1 48
lda #$00 ; CPU:$81B2 PRG:01B2 A9 00
sta OAMADDR ; CPU:$81B4 PRG:01B4 8D 03 20
lda #$02 ; CPU:$81B7 PRG:01B7 A9 02
| 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 |
## Data-table inventory (Pass 3)
- `$8000-$80FF` (256 bytes) - `CopyrightText`
- `$82EA-$8309` (32 bytes) - `PlayerNameTable`
- `$8827-$8875` (79 bytes) - `LevelHandlerPointerTable`
- `$8BFD-$8C04` (8 bytes) - `BlockHeightTable`
- `$8C3A-$8C69` (48 bytes) - `BlockPatternTable`
- `$8FCF-$8FE3` (21 bytes) - `BlockShapeTable`
- `$9017-$9066` (80 bytes) - `BlockLayoutTable`
- `$9090-$9317` (648 bytes) - `BlockPlacementCode`
- `$9344-$935D` (26 bytes) - `BlockAttributeTable`
- `$943F-$99FD` (1471 bytes) - `BlockPointerTable`
- `$9A2C-$9A96` (107 bytes) - `BlockColorTable`
- `$9AB4-$9AC7` (20 bytes) - `BlockCountTable`
- `$9C52-$9C5E` (13 bytes) - `BlockSizeTable`
## Build
```
Byte-identical ROM verified.
```