68k program header
ASM ROM header templates.
For cartridge systems
Address | Size | Description |
$100 | 8 bytes | "NEO-GEO",$00 string (first cartridge recognition code) |
$107 | byte | System version (0) |
$108 | word | NGH number |
$10A | longword | Program size in bytes |
$10E | longword | Pointer to the game save block (in 68k user RAM), will be stored in memcard. |
$112 | word | Size of the game save |
$114 | byte | Boot logo flag. 0=Done by BIOS, 1=Done by game, 2=Nothing |
$115 | byte | Sprite bank number (upper 8 bits of tile number) for the boot logo, if done by BIOS |
$116 | longword | Pointer to Japanese software DIPs settings layout |
$11A | longword | Pointer to US settings software DIPs settings layout |
$11E | longword | Pointer to Euro settings software DIPs settings layout |
$122 | 6 bytes | JMP to USER subroutine (code start) |
$128 | 6 bytes | JMP to PLAYER_START subroutine |
$12E | 6 bytes | JMP to DEMO_END subroutine |
$134 | 6 bytes | JMP to COIN_SOUND subroutine |
$182 | longword | Pointer to security code (second cartridge recognition code) |
Minimal header (from Smkdan's sources)
No need for a complete 68k vector table.
org $0064 dc.l VBLANK ;IRQ handler org $0100 dc.b "NEO-GEO",$00 org $0108 dc.w $017 ;NGH org $0122 jmp Start ;entry org $0114 dc.w $0100 ;logo flag, don't show it just go straight to the entry point org $0182 dc.l Code ;code pointer Code: dc.l $76004A6D,$0A146600,$003C206D,$0A043E2D dc.l $0A0813C0,$00300001,$32100C01,$00FF671A dc.l $30280002,$B02D0ACE,$66103028,$0004B02D dc.l $0ACF6606,$B22D0AD0,$67085088,$51CFFFD4 dc.l $36074E75,$206D0A04,$3E2D0A08,$3210E049 dc.l $0C0100FF,$671A3010,$B02D0ACE,$66123028 dc.l $0002E048,$B02D0ACF,$6606B22D,$0AD06708 dc.l $588851CF,$FFD83607 dc.w $4e75
Full header (from some unknown example code)
org $0100 dc.b "NEO-GEO",$00 dc.w $0052 ;NGH dc.l $00080000 ;P ROM size dc.l $00100000 ;debug DIPs pointer dc.w $01 ;size of DIP data dc.b $00 ;let the BIOS show the logo dc.b $1B ;first tile of the logo is $1B00 dc.l JPConfig ;Japanese config menu pointer dc.l USConfig ;US config menu pointer dc.l EUConfig ;European config menu pointer jmp Start jmp Start jmp Start jmp Start org $0182 dc.l Code ;code pointer Code: dc.l $76004A6D,$0A146600,$003C206D,$0A043E2D dc.l $0A0813C0,$00300001,$32100C01,$00FF671A dc.l $30280002,$B02D0ACE,$66103028,$0004B02D dc.l $0ACF6606,$B22D0AD0,$67085088,$51CFFFD4 dc.l $36074E75,$206D0A04,$3E2D0A08,$3210E049 dc.l $0C0100FF,$671A3010,$B02D0ACE,$66123028 dc.l $0002E048,$B02D0ACF,$6606B22D,$0AD06708 dc.l $588851CF,$FFD83607 dc.w $4e75 ; Configuration menu layouts (soft DIPs) JPConfig: dc.b "0123456789ABCDEF" ; Game name dc.b $FF,$FF,$FF,$FF,$FF,$FF ; Special list dc.b $24,$02,$00,$00,$00,$00,$00,$00,$00,$00 ; Option list dc.b "LIVES " dc.b "1 " dc.b "2 " dc.b "3 " dc.b "4 " dc.b "HOW TO PLAY " dc.b "WITH " dc.b "WITHOUT " USConfig: dc.b "0123456789ABCDEF" ; Game name dc.b $FF,$FF,$FF,$FF,$FF,$FF ; Special list dc.b $24,$02,$00,$00,$00,$00,$00,$00,$00,$00 ; Option list dc.b "LIVES " dc.b "1 " dc.b "2 " dc.b "3 " dc.b "4 " dc.b "HOW TO PLAY " dc.b "WITH " dc.b "WITHOUT " EUConfig: dc.b "0123456789ABCDEF" ; Game name dc.b $FF,$FF,$FF,$FF,$FF,$FF ; Special list dc.b $24,$02,$00,$00,$00,$00,$00,$00,$00,$00 ; Option list dc.b "LIVES " dc.b "1 " dc.b "2 " dc.b "3 " dc.b "4 " dc.b "HOW TO PLAY " dc.b "WITH " dc.b "WITHOUT "
For CD systems
org $100 dc.b "NEO-GEO",$02 ;CDDA flag dc.w $0052 ;NGH dc.l $00080000 ;P ROM size dc.l $00100000 ;debug DIPs pointer dc.w $01 ;size of DIP data dc.b $00 ;let the BIOS show the logo dc.b $1B ;first tile of the logo is $1B00 dc.l JPConfig ;Japanese config menu pointer dc.l USConfig ;US config menu pointer dc.l EUConfig ;European config menu pointer org $122 jmp Start org $13A dc.w $0000 ;Z80 RAM address for CDDA commands