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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

3.3 KiB

Raw Blame History

Othello (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: 14,220 / 32,768 bytes (43.4%). 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	$D6B4
RESET vector	$8000
IRQ vector	$804E

Power-on flow

RESET enters at $8000:

sei                            ; CPU:$8000 PRG:0000  78
lda #$00                       ; CPU:$8001 PRG:0001  A9 00
sta PPUCTRL                    ; CPU:$8003 PRG:0003  8D 00 20
sta PPUMASK                    ; CPU:$8006 PRG:0006  8D 01 20
lda PPUSTATUS                  ; CPU:$8009 PRG:0009  AD 02 20
bpl Reset_OnNonnegative        ; CPU:$800C PRG:000C  10 FB
lda PPUSTATUS                  ; CPU:$800E PRG:000E  AD 02 20
bmi Reset_OnNegative           ; CPU:$8011 PRG:0011  30 FB
lda PPUSTATUS                  ; CPU:$8013 PRG:0013  AD 02 20
bpl Reset_OnNonnegative2       ; CPU:$8016 PRG:0016  10 FB
lda PPUSTATUS                  ; CPU:$8018 PRG:0018  AD 02 20
bmi Reset_OnNegative2          ; CPU:$801B PRG:001B  30 FB

NMI handler at $D6B4:

pha                            ; CPU:$D6B4 PRG:56B4  48
txa                            ; CPU:$D6B5 PRG:56B5  8A
pha                            ; CPU:$D6B6 PRG:56B6  48
tya                            ; CPU:$D6B7 PRG:56B7  98
pha                            ; CPU:$D6B8 PRG:56B8  48
lda #$00                       ; CPU:$D6B9 PRG:56B9  A9 00
sta OAMADDR                    ; CPU:$D6BB PRG:56BB  8D 03 20
lda #$02                       ; CPU:$D6BE PRG:56BE  A9 02

Data-table inventory (Pass 3)

$8350-$8367 (24 bytes) - BoardCellParameterTable
$851E-$854D (48 bytes) - PlayerColorNameTable
$8661-$8699 (57 bytes) - GameModeNameTable
$884A-$888A (65 bytes) - BoardCellNameTable
$8B57-$8B66 (16 bytes) - SlotGameText
$8C80-$8C8B (12 bytes) - PushBButtonText
$9003-$9012 (16 bytes) - BoardMoveOffsetTable
$92BF-$9336 (120 bytes) - BoardCellCharsetTable
$9555-$9561 (13 bytes) - VsScreenLayoutTable
$95AD-$95D6 (42 bytes) - VsScreenLayoutTable2
$9784-$97C3 (64 bytes) - VsScreenLayoutTable3
$98E0-$98F0 (17 bytes) - PushAButtonText
$9967-$997D (23 bytes) - CannotCancelText
$999B-$99AB (17 bytes) - AgainstLevelText
$99C7-$99D9 (19 bytes) - TryAgainText
$99E6-$99FF (26 bytes) - WinsDrawText
$9A09-$9A34 (44 bytes) - StopPushText
$9AD7-$9BAF (217 bytes) - HurryGameEndText
$9FA6-$9FAD (8 bytes) - BoardEdgeGraphic
$A263-$A29F (61 bytes) - PlayerStartPositionTable
$A3E9-$A3F8 (16 bytes) - BoardFlipMaskTable
$ABDB-$ABE2 (8 bytes) - BoardStateBitsTable
$AD3E-$AD53 (22 bytes) - BoardCellWeightTable
$AF00-$AF97 (152 bytes) - RandomSeedTable
$BCCE-$D6A3 (6614 bytes) - BoardTilemapData
$DA49-$DA60 (24 bytes) - ControllerButtonNames
$DD5F-$FFFF (8865 bytes) - LevelGraphicData

Build

Byte-identical ROM verified.

3.3 KiB Raw Blame History