Files
disasm/NROM/Soccer (JU)/README.md
T
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

2.4 KiB

Soccer (JU)

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: 18,110 / 32,768 bytes (55.3%). make assembles and verifies byte-identical to rom.nes.

ROM

Property Value
Format iNES
Mapper 0 (NROM)
PRG 32 KB
CHR 8 KB
Mirroring Vertical
NMI vector $809F
RESET vector $8000
IRQ vector $8000

Power-on flow

RESET enters at $8000:

cld                            ; CPU:$8000 PRG:0000  D8
sei                            ; CPU:$8001 PRG:0001  78
ldx #$00                       ; CPU:$8002 PRG:0002  A2 00
stx PPUCTRL                    ; CPU:$8004 PRG:0004  8E 00 20
stx PPUMASK                    ; CPU:$8007 PRG:0007  8E 01 20
lda PPUSTATUS                  ; CPU:$800A PRG:000A  AD 02 20
bpl Reset_OnNonnegative        ; CPU:$800D PRG:000D  10 FB
dex                            ; CPU:$800F PRG:000F  CA
txs                            ; CPU:$8010 PRG:0010  9A
ldx #$1F                       ; CPU:$8011 PRG:0011  A2 1F
lda Zp50,x                     ; CPU:$8013 PRG:0013  B5 50
sta $0350,x                    ; CPU:$8015 PRG:0015  9D 50 03

NMI handler at $809F:

php                            ; CPU:$809F PRG:009F  08
pha                            ; CPU:$80A0 PRG:00A0  48
txa                            ; CPU:$80A1 PRG:00A1  8A
pha                            ; CPU:$80A2 PRG:00A2  48
tya                            ; CPU:$80A3 PRG:00A3  98
pha                            ; CPU:$80A4 PRG:00A4  48
ldx #$03                       ; CPU:$80A5 PRG:00A5  A2 03
lda $80EE,x                    ; CPU:$80A7 PRG:00A7  BD EE 80

Data-table inventory (Pass 3)

  • $8251-$8262 (18 bytes) - LevelHandlerPointerTable
  • $82EF-$8306 (24 bytes) - PlayerSpeedTable
  • $832C-$832F (4 bytes) - LevelStartParameterTable
  • $8921-$8996 (118 bytes) - PlayerMovementTable
  • $89D2-$89DB (10 bytes) - PlayerDirectionTable
  • $8C07-$8C0B (5 bytes) - FieldPlayerPositionTable
  • $8D44-$8DD3 (144 bytes) - FieldPlayerSpriteTable
  • $8ED1-$8F20 (80 bytes) - FieldNameText
  • $9007-$9012 (12 bytes) - PlayerSpeedFineTable

Build

Byte-identical ROM verified.