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
67 lines
2.3 KiB
Markdown
67 lines
2.3 KiB
Markdown
# Magmax (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: 11,613 / 32,768 bytes (35.4%).
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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 | Horizontal |
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| NMI vector | $BD33 |
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| RESET vector | $BC33 |
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| IRQ vector | $BC33 |
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## Power-on flow
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RESET enters at `$BC33`:
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lda #$00 ; CPU:$BC33 PRG:3C33 A9 00
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sta PPUCTRL ; CPU:$BC35 PRG:3C35 8D 00 20
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lda PPUSTATUS ; CPU:$BC38 PRG:3C38 AD 02 20
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bpl Reset_OnNonnegative ; CPU:$BC3B PRG:3C3B 10 FB
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sei ; CPU:$BC3D PRG:3C3D 78
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cld ; CPU:$BC3E PRG:3C3E D8
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ldx #$FF ; CPU:$BC3F PRG:3C3F A2 FF
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txs ; CPU:$BC41 PRG:3C41 9A
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ldx #$7F ; CPU:$BC42 PRG:3C42 A2 7F
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lda $057E,x ; CPU:$BC44 PRG:3C44 BD 7E 05
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cmp $BC33,x ; CPU:$BC47 PRG:3C47 DD 33 BC
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bne Reset_Loop ; CPU:$BC4A PRG:3C4A D0 06
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NMI handler at `$BD33`:
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lda #$07 ; CPU:$BD33 PRG:3D33 A9 07
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sta OAMDMA ; CPU:$BD35 PRG:3D35 8D 14 40
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lda #$00 ; CPU:$BD38 PRG:3D38 A9 00
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sta PPUMASK ; CPU:$BD3A PRG:3D3A 8D 01 20
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jsr Sub_CEAB ; CPU:$BD3D PRG:3D3D 20 AB CE
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lda Zp6B ; CPU:$BD40 PRG:3D40 A5 6B
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sta PPUMASK ; CPU:$BD42 PRG:3D42 8D 01 20
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lda Zp6C ; CPU:$BD45 PRG:3D45 A5 6C
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## Data-table inventory (Pass 3)
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- `$8000-$BC32` (15411 bytes) - `UnreachedRomData`
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- `$BDC2-$BDF6` (53 bytes) - `ObjectHandlerPointerTable`
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- `$C471-$C485` (21 bytes) - `ObjectAttributeTable`
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- `$C7C3-$C860` (158 bytes) - `ObjectMovementTable`
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- `$C8AD-$C9BE` (274 bytes) - `LevelGraphicData`
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- `$C9E6-$CA01` (28 bytes) - `ObjectPointerTable`
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- `$CA9A-$CADF` (70 bytes) - `LevelTilePatternData`
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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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