68k program header: Difference between revisions

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ASM ROM header templates.
ASM ROM header templates.


== For cartridge systems ==
==For cartridge systems==


{|class="regdef"
{|class="regdef"
Line 10: Line 10:
|$100
|$100
|7 bytes
|7 bytes
|"NEO-GEO" string (first cartridge recognition code)
|"NEO-GEO" string (first cartridge recognition code).
|-
|-
|$107
|$107
|byte
|byte
|System version (0 for cartridge systems, 1 or 2 for adapted cart games on Neo CD ?)
|System version (0 for cartridge systems, 1 or 2 for adapted cart games on Neo CD ?).
|-
|-
|$108
|$108
|word
|word
|[[NGH number]], 0000 prohibited
|[[NGH number]] in BCD, 0000 prohibited.
|-
|-
|$10A
|$10A
|longword
|longword
|Program size in bytes
|Total [[P ROM]] data size in bytes.
|-
|-
|$10E
|$10E
|longword
|longword
|Pointer to the game save block (in [[68k user RAM]]), will be stored in memcard.
|Pointer to backup RAM data block (in [[68k user RAM]]). The first 2 bytes are the [[debug DIPs]].
|-
|-
|$112
|$112
|word
|word
|Size of the game save in bytes
|Size of the required game save data in bytes.
|-
|-
|$114
|$114
|byte
|byte
|Eye-catcher animation flag. 0=Done by BIOS, 1=Done by game, 2=Nothing
|[[Eyecatcher]] animation flag. 0=Done by system ROM, 1=Done by game, 2=Nothing.
|-
|-
|$115
|$115
|byte
|byte
|Sprite bank number (upper 8 bits of tile number) for the eye-catcher logo, if done by BIOS
|Sprite bank number (upper 8 bits of tile number) for the eye-catcher logo, if done by system ROM.
|-
|-
|$116
|$116
|longword
|longword
|Pointer to Japanese [[Software_DIPs|software DIPs settings layout]]
|Pointer to Japanese [[Software_DIPs|software DIPs settings layout]].
|-
|-
|$11A
|$11A
|longword
|longword
|Pointer to US settings software DIPs settings layout
|Pointer to US settings software DIPs settings layout.
|-
|-
|$11E
|$11E
|longword
|longword
|Pointer to Euro settings software DIPs settings layout
|Pointer to Euro settings software DIPs settings layout.
|-
|-
|$122
|$122
|6 bytes
|6 bytes
|JMP to [[USER subroutine]] (code start)
|JMP to [[USER subroutine]] (code start).
|-
|-
|$128
|$128
|6 bytes
|6 bytes
|JMP to [[PLAYER_START subroutine]]
|JMP to [[PLAYER_START subroutine]].
|-
|-
|$12E
|$12E
|6 bytes
|6 bytes
|JMP to [[DEMO_END subroutine]]
|JMP to [[DEMO_END subroutine]].
|-
|-
|$134
|$134
|6 bytes
|6 bytes
|JMP to [[COIN_SOUND subroutine]]
|JMP to [[COIN_SOUND subroutine]].
|-
|-
|$182
|$182
|longword
|longword
|Pointer to [[security code]] (second cartridge recognition code)
|Pointer to [[security code]] (second cartridge recognition code).
|-
|$186
|longword
|Unknown (seems only set to 0x00000000 on boards containing Spanish software DIPs).
|-
|$18A
|longword
|Unknown (seems only set to 0x00000001 on boards containing Spanish software DIPs).
|-
|$18E
|longword
|Pointer to Spanish settings software DIPs settings layout (not all games use this).
|}
|}


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<syntaxhighlight>
<syntaxhighlight>
org $0000
dc.l $10F300
org $0004
dc.l $C00402
org $0064
org $0064
dc.l VBLANK ;IRQ handler
dc.l VBLANK ;IRQ handler
Line 106: Line 124:
dc.w $4e75
dc.w $4e75
</syntaxhighlight>
</syntaxhighlight>


===Full header (from some unknown example code)===
===Full header (from some unknown example code)===

Latest revision as of 21:45, 11 September 2017

ASM ROM header templates.

For cartridge systems

Address Size Description
$100 7 bytes "NEO-GEO" string (first cartridge recognition code).
$107 byte System version (0 for cartridge systems, 1 or 2 for adapted cart games on Neo CD ?).
$108 word NGH number in BCD, 0000 prohibited.
$10A longword Total P ROM data size in bytes.
$10E longword Pointer to backup RAM data block (in 68k user RAM). The first 2 bytes are the debug DIPs.
$112 word Size of the required game save data in bytes.
$114 byte Eyecatcher animation flag. 0=Done by system ROM, 1=Done by game, 2=Nothing.
$115 byte Sprite bank number (upper 8 bits of tile number) for the eye-catcher logo, if done by system ROM.
$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).
$186 longword Unknown (seems only set to 0x00000000 on boards containing Spanish software DIPs).
$18A longword Unknown (seems only set to 0x00000001 on boards containing Spanish software DIPs).
$18E longword Pointer to Spanish settings software DIPs settings layout (not all games use this).

Minimal header (from Smkdan's sources)

No need for a complete 68k vector table. 

	org $0000
	dc.l $10F300

	org $0004
	dc.l $C00402

	org $0064
	dc.l VBLANK	;IRQ handler

	org $0100
	dc.b "NEO-GEO",$00

	org $0108
	dc.w $1234	;NGH

	org $0122
	jmp USER	;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 $1234        ;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        USER
    jmp        PLAYER_START
    jmp        DEMO_END
    jmp        COIN_SOUND

    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    $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
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