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
87 lines
3.3 KiB
Markdown
87 lines
3.3 KiB
Markdown
# Othello (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: 14,220 / 32,768 bytes (43.4%).
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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 | $D6B4 |
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| RESET vector | $8000 |
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| IRQ vector | $804E |
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## Power-on flow
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RESET enters at `$8000`:
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sei ; CPU:$8000 PRG:0000 78
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lda #$00 ; CPU:$8001 PRG:0001 A9 00
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sta PPUCTRL ; CPU:$8003 PRG:0003 8D 00 20
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sta PPUMASK ; CPU:$8006 PRG:0006 8D 01 20
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lda PPUSTATUS ; CPU:$8009 PRG:0009 AD 02 20
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bpl Reset_OnNonnegative ; CPU:$800C PRG:000C 10 FB
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lda PPUSTATUS ; CPU:$800E PRG:000E AD 02 20
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bmi Reset_OnNegative ; CPU:$8011 PRG:0011 30 FB
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lda PPUSTATUS ; CPU:$8013 PRG:0013 AD 02 20
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bpl Reset_OnNonnegative2 ; CPU:$8016 PRG:0016 10 FB
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lda PPUSTATUS ; CPU:$8018 PRG:0018 AD 02 20
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bmi Reset_OnNegative2 ; CPU:$801B PRG:001B 30 FB
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NMI handler at `$D6B4`:
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pha ; CPU:$D6B4 PRG:56B4 48
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txa ; CPU:$D6B5 PRG:56B5 8A
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pha ; CPU:$D6B6 PRG:56B6 48
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tya ; CPU:$D6B7 PRG:56B7 98
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pha ; CPU:$D6B8 PRG:56B8 48
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lda #$00 ; CPU:$D6B9 PRG:56B9 A9 00
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sta OAMADDR ; CPU:$D6BB PRG:56BB 8D 03 20
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lda #$02 ; CPU:$D6BE PRG:56BE A9 02
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## Data-table inventory (Pass 3)
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- `$8350-$8367` (24 bytes) - `BoardCellParameterTable`
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- `$851E-$854D` (48 bytes) - `PlayerColorNameTable`
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- `$8661-$8699` (57 bytes) - `GameModeNameTable`
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- `$884A-$888A` (65 bytes) - `BoardCellNameTable`
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- `$8B57-$8B66` (16 bytes) - `SlotGameText`
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- `$8C80-$8C8B` (12 bytes) - `PushBButtonText`
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- `$9003-$9012` (16 bytes) - `BoardMoveOffsetTable`
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- `$92BF-$9336` (120 bytes) - `BoardCellCharsetTable`
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- `$9555-$9561` (13 bytes) - `VsScreenLayoutTable`
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- `$95AD-$95D6` (42 bytes) - `VsScreenLayoutTable2`
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- `$9784-$97C3` (64 bytes) - `VsScreenLayoutTable3`
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- `$98E0-$98F0` (17 bytes) - `PushAButtonText`
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- `$9967-$997D` (23 bytes) - `CannotCancelText`
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- `$999B-$99AB` (17 bytes) - `AgainstLevelText`
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- `$99C7-$99D9` (19 bytes) - `TryAgainText`
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- `$99E6-$99FF` (26 bytes) - `WinsDrawText`
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- `$9A09-$9A34` (44 bytes) - `StopPushText`
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- `$9AD7-$9BAF` (217 bytes) - `HurryGameEndText`
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- `$9FA6-$9FAD` (8 bytes) - `BoardEdgeGraphic`
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- `$A263-$A29F` (61 bytes) - `PlayerStartPositionTable`
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- `$A3E9-$A3F8` (16 bytes) - `BoardFlipMaskTable`
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- `$ABDB-$ABE2` (8 bytes) - `BoardStateBitsTable`
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- `$AD3E-$AD53` (22 bytes) - `BoardCellWeightTable`
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- `$AF00-$AF97` (152 bytes) - `RandomSeedTable`
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- `$BCCE-$D6A3` (6614 bytes) - `BoardTilemapData`
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- `$DA49-$DA60` (24 bytes) - `ControllerButtonNames`
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- `$DD5F-$FFFF` (8865 bytes) - `LevelGraphicData`
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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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