BIOS calls

Please see 68k ASM defines or C Defines for the hex addresses.

Jump tables

Call address	NEO-EP0 AES BIOS	"SP-E" MVS BIOS	"TOP-SP1-1" CDM3-2 BIOS & "FRONT-SP1" BIOS	"NEOCD.BIN" CDZ BIOS
$C00402 to $C00432	Entry point
$C00438	SYSTEM_INT1
$C0043E	SYSTEM_INT2		RTS
$C00444	SYSTEM_RETURN
$C0044A	SYSTEM_IO
$C00450	CREDIT_CHECK
$C00456	CREDIT_DOWN
$C0045C	RTS	READ_CALENDAR	RTS
$C00462	RTS	SETUP_CALENDAR	RTS
$C00468	CARD
$C0046E	CARD_ERROR
$C00474	HOW_TO_PLAY		RTS
$C0047A	Calc a checksum and loop forever		RTS
$C00480 to $C004BC	RTS
$C004C2	FIX_CLEAR
$C004C8	LSP_1st
$C004CE	MESS_OUT
$C004D4	CONTROLLER_SETUP
$C004DA	RTS		HBlank handler
$C004E0 to $C004F2	Invalid		$FF0000 range register operations and RTEs
$C004F8 to $C0051C	Invalid		RTS
$C00522 to $C00540	Invalid		?
$C00546	Invalid		BIOSF_UPLOAD
$C0054C	Invalid		?
$C00552	Invalid		BIOSF_LOADFILE
$C00558	Invalid		?
$C0055E	Invalid		BIOSF_CDPLAYER
$C00564	Invalid		BIOSF_LOADFILEX (?)
$C0056A	Invalid		BIOSF_CDDACMD
$C00570	Invalid		BIOSF_VIDEOEN
$C00576	Invalid		BIOSF_PUSHCDOP
$C0057C	Invalid		BIOSF_SETCDDMODE
$C00582	Invalid		BIOSF_RESETGAME
$C00588 to $C00594	Invalid		RTS	?
$C0059A to $C006FC	Invalid		RTS

Generic BIOS calls

BIOS calls common to every system.

• FIX_CLEAR: Clear fix layer
• LSP_1st: Clear sprites
• SYSTEM_INT1: Multiple purpose VBL routine
• CARD: Perform memory card operation

MVS only BIOS calls

• READ_CALENDAR: Read the current calendar values and update the relevant BIOS RAM locations
• SETUP_CALENDAR: Set the calendar values to the data from the relevant BIOS RAM locations

CD only BIOS calls

• BIOSF_VIDEOEN: Enable/disable video layers
• BIOSF_UPLOAD: Upload data to DRAM
• BIOSF_LOADFILE: Load file from CD (with animation)
• BIOSF_CDPLAYER ($C0055E): Reset to CD player
• BIOSF_LOADFILEX (?) ($C00564): Load file from CD (no animation)
• BIOSF_CDDACMD: Issue CDDA command

CDZ only BIOS calls

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