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
76 lines
2.7 KiB
Markdown
76 lines
2.7 KiB
Markdown
# Slalom (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: 10,537 / 32,768 bytes (32.2%).
|
|
`make` assembles and verifies byte-identical to `rom.nes`.
|
|
|
|
## ROM
|
|
|
|
| Property | Value |
|
|
|----------|-------|
|
|
| Format | iNES |
|
|
| Mapper | 0 (NROM) |
|
|
| PRG | 32 KB |
|
|
| CHR | 8 KB |
|
|
| Mirroring | Vertical |
|
|
| NMI vector | $8123 |
|
|
| RESET vector | $8050 |
|
|
| IRQ vector | $FEDF |
|
|
|
|
## Power-on flow
|
|
|
|
RESET enters at `$8050`:
|
|
|
|
sei ; CPU:$8050 PRG:0050 78
|
|
cld ; CPU:$8051 PRG:0051 D8
|
|
lda #$18 ; CPU:$8052 PRG:0052 A9 18
|
|
sta PPUCTRL ; CPU:$8054 PRG:0054 8D 00 20
|
|
lda PPUSTATUS ; CPU:$8057 PRG:0057 AD 02 20
|
|
bpl Reset_OnNonnegative ; CPU:$805A PRG:005A 10 FB
|
|
lda PPUSTATUS ; CPU:$805C PRG:005C AD 02 20
|
|
bpl Reset_OnNonnegative2 ; CPU:$805F PRG:005F 10 FB
|
|
jsr Sub_B476 ; CPU:$8061 PRG:0061 20 76 B4
|
|
jsr Sub_8A6D ; CPU:$8064 PRG:0064 20 6D 8A
|
|
lda #$FF ; CPU:$8067 PRG:0067 A9 FF
|
|
sta $0731 ; CPU:$8069 PRG:0069 8D 31 07
|
|
|
|
NMI handler at `$8123`:
|
|
|
|
lda PPUSTATUS ; CPU:$8123 PRG:0123 AD 02 20
|
|
lda #$00 ; CPU:$8126 PRG:0126 A9 00
|
|
sta OAMADDR ; CPU:$8128 PRG:0128 8D 03 20
|
|
lda #$04 ; CPU:$812B PRG:012B A9 04
|
|
sta OAMDMA ; CPU:$812D PRG:012D 8D 14 40
|
|
jsr Sub_B438 ; CPU:$8130 PRG:0130 20 38 B4
|
|
ldx Zp02 ; CPU:$8133 PRG:0133 A6 02
|
|
lda $8142,x ; CPU:$8135 PRG:0135 BD 42 81
|
|
|
|
## Data-table inventory (Pass 3)
|
|
|
|
- `$8000-$804F` (80 bytes) - `CopyrightText`
|
|
- `$8142-$8165` (36 bytes) - `GameStateHandlerPointerTable`
|
|
- `$8287-$829A` (20 bytes) - `ObjectHandlerPointerTable`
|
|
- `$8347-$8372` (44 bytes) - `ObjectActionPointerTable`
|
|
- `$84C6-$84EB` (38 bytes) - `SkiRecordNameTable`
|
|
- `$85C5-$87F7` (563 bytes) - `PlayerNameText`
|
|
- `$8828-$8876` (79 bytes) - `WorldRecordText`
|
|
- `$8AD8-$8B25` (78 bytes) - `CourseNameTable`
|
|
- `$8B59-$8B7B` (35 bytes) - `CourseRecordTable`
|
|
- `$8CA1-$8CA6` (6 bytes) - `CharacterCharsetTable`
|
|
- `$8CE4-$8CF7` (20 bytes) - `GameOverText`
|
|
- `$8FB3-$9032` (128 bytes) - `SkierXPositionTable`
|
|
- `$9067-$9086` (32 bytes) - `SkierMovementTable`
|
|
- `$9125-$9130` (12 bytes) - `KeyboardInputMap`
|
|
- `$9205-$925C` (88 bytes) - `SlalomPathTable`
|
|
- `$9648-$966F` (40 bytes) - `SkierSpeedTable`
|
|
|
|
## Build
|
|
|
|
```
|
|
Byte-identical ROM verified.
|
|
```
|