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tmerritt 6740550ac0 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

2026-10-21 16:43:54 -04:00

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Elevator Action (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: 19,446 / 32,768 bytes (59.3%). 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	$8081
RESET vector	$8000
IRQ vector	$8000

Power-on flow

RESET enters at $8000:

sei                            ; CPU:$8000 PRG:0000  78
cld                            ; CPU:$8001 PRG:0001  D8
ldx #$FF                       ; CPU:$8002 PRG:0002  A2 FF
txs                            ; CPU:$8004 PRG:0004  9A
lda #$10                       ; CPU:$8005 PRG:0005  A9 10
sta PPUCTRL                    ; CPU:$8007 PRG:0007  8D 00 20
lda PPUSTATUS                  ; CPU:$800A PRG:000A  AD 02 20
bpl Reset_OnNonnegative                 ; CPU:$800D PRG:000D  10 FB
lda #$FF                       ; CPU:$800F PRG:000F  A9 FF
ldy #$24                       ; CPU:$8011 PRG:0011  A0 24
sta $0200,y                    ; CPU:$8013 PRG:0013  99 00 02
dey                            ; CPU:$8016 PRG:0016  88

NMI handler at $8081:

sta NmiSaveA                       ; CPU:$8081 PRG:0081  85 9A
stx NmiSaveX                       ; CPU:$8083 PRG:0083  86 9B
sty NmiSaveY                       ; CPU:$8085 PRG:0085  84 9C
lda ZpFA                       ; CPU:$8087 PRG:0087  A5 FA
beq NmiHandler_Loop                 ; CPU:$8089 PRG:0089  F0 03
jmp Sub_81D6                      ; CPU:$808B PRG:008B  4C D6 81
lda PpuCtrlShadow                       ; CPU:$808E PRG:008E  A5 88
and #$7F                       ; CPU:$8090 PRG:0090  29 7F

Data-table inventory (Pass 3)

$83CB-$844E (132 bytes) - EnemySpawnOffsetTable
$8628-$973D (4374 bytes) - EnemyHandlerPointerTable
$9CA1-$9D61 (193 bytes) - EnemyAttributeMaskTable
$A240-$A24F (16 bytes) - EnemySpriteXPositionTable
$A281-$A284 (4 bytes) - LevelDataPointerTable
$A348-$A3E2 (155 bytes) - EnemyMoveCodeTable
$A3F9-$A46E (118 bytes) - EnemySpawnScriptTable
$AA9B-$B50C (2674 bytes) - LevelTilemapData
$B525-$B58C (104 bytes) - EnemySpritePatternTable
$B599-$BB2A (1426 bytes) - EnemyTileGraphicData
$BDB5-$BDC9 (21 bytes) - EnemyScriptPointerTable
$BE15-$BE1D (9 bytes) - EnemyScriptEntryTable
$C2F1-$C320 (48 bytes) - SpriteOamAttributeTable
$C487-$C837 (945 bytes) - SpriteOamEntryTable
$D0DE-$D0ED (16 bytes) - EnemySpeedTable
$D187-$D2B5 (303 bytes) - LevelObjectPointerTable
$D586-$D599 (20 bytes) - EnemySpawnRecordTable
$D6B4-$D73D (138 bytes) - EnemyPaletteRecordTable
$E61D-$E79D (385 bytes) - EnemyMovementDeltaTable
$F0E1-$F0E6 (6 bytes) - EnemyFallingSpeedTable
$F1E3-$F4DA (760 bytes) - LevelSceneryTileData
$F6FC-$F703 (8 bytes) - PpuBitMaskTable
$F956-$F975 (32 bytes) - LevelHandlerPointerTable
$F9BB-$F9C2 (8 bytes) - PpuInverseBitMaskTable
$FA73-$FFFF (1421 bytes) - LevelSceneryLayoutData

Build

Byte-identical ROM verified.

3.3 KiB Raw Blame History