BIOS calls

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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 ?
$C00522 Invalid BIOSF_LOADFILE
$C00558 Invalid ?
$C0055E Invalid BIOSF_CDPLAYER
$C00564 Invalid BIOSF_LOADFILEX (?)
$C0056A Invalid BIOSF_CDDACMD
$C00570 Invalid BIOSF_VIDEOEN
$C00576 to $C00582 Invalid ?
$C00588 to $C00594 Invalid RTS ?
$C0059A to $C006FC Invalid RTS

Generic BIOS calls

BIOS calls common to every system.

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

CDZ only BIOS calls

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