tmerritt
6740550ac0
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
77 lines
2.9 KiB
Markdown
77 lines
2.9 KiB
Markdown
# Sqoon (U)
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## Status
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**Pass 3 complete; promoted.** `prg.s` is a traced disassembly with all
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address-derived labels replaced, all `jsr`/`jmp` operands symbolic, hardware
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registers named via `symbols.inc`, and `apply_symbols.py` reporting 0 residue.
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Code coverage: 18,471 / 32,768 bytes (56.4%).
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`make` assembles and verifies byte-identical to `rom.nes`.
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## ROM
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| Property | Value |
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|----------|-------|
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| Format | iNES |
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| Mapper | 0 (NROM) |
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| PRG | 32 KB |
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| CHR | 8 KB |
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| Mirroring | Vertical |
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| NMI vector | $8014 |
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| RESET vector | $8000 |
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| IRQ vector | $80F1 |
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## Power-on flow
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RESET enters at `$8000`:
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ldx #$FF ; CPU:$8000 PRG:0000 A2 FF
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txs ; CPU:$8002 PRG:0002 9A
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stx NmiFrameFlag ; CPU:$8003 PRG:0003 86 FE
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jsr Sub_82B2 ; CPU:$8005 PRG:0005 20 B2 82
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jsr Sub_817B ; CPU:$8008 PRG:0008 20 7B 81
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lda #$00 ; CPU:$800B PRG:000B A9 00
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sta NmiFrameFlag ; CPU:$800D PRG:000D 85 FE
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sta Zp9A ; CPU:$800F PRG:000F 85 9A
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jmp Sub_80EE ; CPU:$8011 PRG:0011 4C EE 80
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pha ; CPU:$8014 PRG:0014 48
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lda NmiFrameFlag ; CPU:$8015 PRG:0015 A5 FE
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beq NmiHandler_Loop ; CPU:$8017 PRG:0017 F0 03
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NMI handler at `$8014`:
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pha ; CPU:$8014 PRG:0014 48
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lda NmiFrameFlag ; CPU:$8015 PRG:0015 A5 FE
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beq NmiHandler_Loop ; CPU:$8017 PRG:0017 F0 03
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jmp IrqHandler ; CPU:$8019 PRG:0019 4C F1 80
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inc NmiFrameFlag ; CPU:$801C PRG:001C E6 FE
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inc FrameCounter ; CPU:$801E PRG:001E E6 54
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jsr Sub_8158 ; CPU:$8020 PRG:0020 20 58 81
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lda PpuCtrlShadow ; CPU:$8023 PRG:0023 A5 1D
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## Data-table inventory (Pass 3)
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- `$833A-$83A2` (105 bytes) - `EnemyAnimationScriptTable`
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- `$83C2-$83D3` (18 bytes) - `RoutinePointerTable`
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- `$84A0-$84AF` (16 bytes) - `EnemyPathDeltaTable`
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- `$85F3-$8606` (20 bytes) - `GameOverText`
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- `$8690-$86A9` (26 bytes) - `EnemyGraphicTileIndexTable`
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- `$8814-$8825` (18 bytes) - `LevelObjectDefinitionTable`
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- `$8AB4-$8AD7` (36 bytes) - `EnemyTileIndexTable`
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- `$8B48-$8B55` (14 bytes) - `PhaseLeftText`
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- `$8BBD-$8BC7` (11 bytes) - `LevelStartParameterTable`
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- `$8C41-$8C60` (32 bytes) - `EnemyMovementParameterTable`
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- `$B5D5-$B5DD` (9 bytes) - `HomeDataText`
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- `$BB39-$DC18` (8416 bytes) - `LevelGraphicData`
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- `$DC6E-$DC8A` (29 bytes) - `EnemySpeedParameterTable`
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- `$DD1A-$E08A` (881 bytes) - `SpriteGraphicData`
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- `$E134-$E238` (261 bytes) - `EnemyHandlerPointerTable`
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- `$E4B7-$F5D3` (4381 bytes) - `LevelCollisionData`
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- `$FFE8-$FFFF` (24 bytes) - `VectorTable`
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## Build
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```
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Byte-identical ROM verified.
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```
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