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

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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## Status
**Pass 3.** Hardware-register operands use `symbols.inc` names
(`apply_symbols.py`: 0 unexplained residue); zero-page slots keep their
documented `ZpXX` names with ref counts in `locals.inc`; data tables remain
classified with ROM provenance. `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: 17,068 / 32,768 bytes (52.1%).
`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 | Vertical |
| 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 | $82D6 |
| RESET vector | $8258 |
| IRQ vector | $FFF0 |
| ROM file | `Kung Fu (U).nes` |
| SHA-256 | `ba57badd19db565481c5d9d7f86bfa0a919725a9661144d69925f501c9a0f4a1` |
### Header notes
## Power-on flow
- none
RESET enters at `$8258`:
## Open work
sei ; CPU:$8258 PRG:0258 78
cld ; CPU:$8259 PRG:0259 D8
lda #$00 ; CPU:$825A PRG:025A A9 00
sta PPUCTRL ; CPU:$825C PRG:025C 8D 00 20
ldx #$FF ; CPU:$825F PRG:025F A2 FF
txs ; CPU:$8261 PRG:0261 9A
lda PPUSTATUS ; CPU:$8262 PRG:0262 AD 02 20
asl a ; CPU:$8265 PRG:0265 0A
bcc Reset_OnCarryClear ; CPU:$8266 PRG:0266 90 FA
lda PPUSTATUS ; CPU:$8268 PRG:0268 AD 02 20
asl a ; CPU:$826B PRG:026B 0A
bcc Reset_OnCarryClear2 ; CPU:$826C PRG:026C 90 FA
- **Pass 1** - run `nesdis.py` over `prg.bin` to produce the code/data
split. The tracer reads the vectors from the last six bytes of the PRG
image, so the split seeds correctly.
- **Pass 1** must emit the canonical audit comment
`; CPU:$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 `$82D6`:
## Files
lda Zp10 ; CPU:$82D6 PRG:02D6 A5 10
and #$7F ; CPU:$82D8 PRG:02D8 29 7F
sta PPUCTRL ; CPU:$82DA PRG:02DA 8D 00 20
sta Zp10 ; CPU:$82DD PRG:02DD 85 10
lda #$00 ; CPU:$82DF PRG:02DF A9 00
sta PPUMASK ; CPU:$82E1 PRG:02E1 8D 01 20
lda #$00 ; CPU:$82E4 PRG:02E4 A9 00
sta OAMADDR ; CPU:$82E6 PRG:02E6 8D 03 20
| 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-$8257` (600 bytes) - `LevelHandlerPointerTable`
- `$841B-$8426` (12 bytes) - `LevelObjectDefinitionTable`
- `$8C8A-$8DCE` (325 bytes) - `SpriteOamEntryTable`
- `$9032-$9807` (2006 bytes) - `EnemyNameTextTable`
- `$9810-$A481` (3186 bytes) - `EnemySpritePatternTable`
- `$B6CD-$B713` (71 bytes) - `LevelObjectSpawnTable`
- `$BB6F-$BDC3` (597 bytes) - `SpriteOamAttributeTable`
- `$CDDD-$CFCB` (495 bytes) - `EnemyAnimationFrameTable`
- `$D386-$D3C5` (64 bytes) - `LevelSceneryData`
- `$DAE7-$DAE9` (3 bytes) - `LevelSceneryPadding`
- `$DB48-$F830` (7401 bytes) - `LevelGraphicData`
- `$F981-$F9B8` (56 bytes) - `EnemyMovementSpeedTable`
- `$FA36-$FA89` (84 bytes) - `EnemyMovementDeltaTable`
## Build
```
Byte-identical ROM verified.
```