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
2.6 KiB
2.6 KiB
Galaga (U)
Status
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: 11,319 / 32,768 bytes (34.5%).
make assembles and verifies byte-identical to rom.nes.
ROM
| Property | Value |
|---|---|
| Format | iNES |
| Mapper | 0 (NROM) |
| PRG | 32 KB |
| CHR | 8 KB |
| Mirroring | Horizontal |
| NMI vector | $C0C8 |
| RESET vector | $C000 |
| IRQ vector | $C000 |
Power-on flow
RESET enters at $C000:
sei ; CPU:$C000 PRG:4000 78
cld ; CPU:$C001 PRG:4001 D8
ldx #$00 ; CPU:$C002 PRG:4002 A2 00
stx PPUCTRL ; CPU:$C004 PRG:4004 8E 00 20
stx PPUMASK ; CPU:$C007 PRG:4007 8E 01 20
lda PPUSTATUS ; CPU:$C00A PRG:400A AD 02 20
bpl Reset_OnNonnegative ; CPU:$C00D PRG:400D 10 FB
ldx #$BF ; CPU:$C00F PRG:400F A2 BF
txs ; CPU:$C011 PRG:4011 9A
lda #$A5 ; CPU:$C012 PRG:4012 A9 A5
cmp ZpFF ; CPU:$C014 PRG:4014 C5 FF
bne Reset_Loop ; CPU:$C016 PRG:4016 D0 04
NMI handler at $C0C8:
pha ; CPU:$C0C8 PRG:40C8 48
txa ; CPU:$C0C9 PRG:40C9 8A
pha ; CPU:$C0CA PRG:40CA 48
tya ; CPU:$C0CB PRG:40CB 98
pha ; CPU:$C0CC PRG:40CC 48
ldx Zp4A ; CPU:$C0CD PRG:40CD A6 4A
dex ; CPU:$C0CF PRG:40CF CA
bne NmiHandler_Loop ; CPU:$C0D0 PRG:40D0 D0 19
Data-table inventory (Pass 3)
$8000-$BDFF(15872 bytes) -UnreachedRomData$BE59-$BFFF(423 bytes) -UnreachedRomData2$C480-$C49F(32 bytes) -SpriteHeightTable$CC32-$CC37(6 bytes) -SpriteSpawnOffsetTable$D816-$D819(4 bytes) -SpriteStarCountTable$D9CA-$D9CF(6 bytes) -SpriteMovementParameterTable$E0F3-$E112(32 bytes) -ExplosionGraphicTable$E1E8-$E1E8(1 bytes) -UnreachedByte$E69A-$E69A(1 bytes) -UnreachedByte2$E7B1-$E7B5(5 bytes) -SpriteScoreTable$E9AA-$EAD9(304 bytes) -SpriteAttributeTable$EC7B-$EC84(10 bytes) -LevelStarPointerTable$ED8E-$F78F(2562 bytes) -LevelGraphicData$F7B4-$FFFF(2124 bytes) -SpriteGraphicData
Build
Byte-identical ROM verified.