68k program header

ASM ROM header templates.

For cartridge systems

• $0064: VBlank handling routine pointer
• $0100: "NEO-GEO",$00 string
• $0108: NGH number
• $010A: program size (isn't read by any bios)
• $010E: pointer to debug DIPs (in user RAM) (isn't read by any bios)
• $0114: boot logo flag and tile number
• $0116: pointer to Japanese software DIPs settings layout
• $011A: pointer to US settings software DIPs settings layout
• $011E: pointer to Euro settings software DIPs settings layout
• $0122: pointer to code start
• $0182: pointer to security 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    ;ROM p1 size
    dc.l $00100000    ;debug DIPs pointer
    dc.w $01          ;unknown
    dc.b $00          ;bootscreen flag, anything else than 0x00 means no logo
    dc.b $1B          ;first tile number of the NeoGeo logo in the C ROMs
    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    $1234                   ;NGH
    dc.l    $00500000               ;from Metal Slug 2
    dc.l    $0010F000               ;debug DIPs pointer
    dc.w    $007A                   ;not used ?
    dc.w    $00A1                   ;not used ?

    org     $122
    jmp     Start
    jmp     Generic                 ;?
    jmp     Generic                 ;?
    jmp     Generic                 ;?

    org     $13A
    dc.w    $0000                   ;Z80 RAM address for CDDA commands

Generic:
    rte
    rts