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- ;-----------------------------------------------------------------------;
- ; File Name - CDBIOS.INC ;
- ;-----------------------------------------------------------------------;
- ;File includes all the macro calls for using the BIOS routines. ;
- ; ;
- ; REVISION HISTORY: ;
- ; ;
- ; name date comments ;
- ; ---- ------- ----------------------------------- ;
- ; DRM 04/25/93 file created ;
- ; DWM 04/28/93 converted to SNASM format ;
- ; DWM 05/25/93 added backup ram macro calls ;
- ; JMY 03/31/94 added bios_cdbstat macro def
- ;-----------------------------------------------------------------------;
- ;-----------------------------------------------------------------------
- ; This file defines the entry points and other essential information
- ; needed to call the BIOS from assembly language. It also defines a set
- ; of macros for calling BIOS functions.
- ;-----------------------------------------------------------------------
- if ~def (CDBIOS_INC)
- CDBIOS_INC EQU 1
- ;-----------------------------------------------------------------------
- ; INCLUDES
- ;-----------------------------------------------------------------------
- ;-----------------------------------------------------------------------
- ; BIOS FUNCTION CODES
- ;-----------------------------------------------------------------------
- MSCSTOP EQU $0002
- MSCPAUSEON EQU $0003
- MSCPAUSEOFF EQU $0004
- MSCSCANFF EQU $0005
- MSCSCANFR EQU $0006
- MSCSCANOFF EQU $0007
- ROMPAUSEON EQU $0008
- ROMPAUSEOFF EQU $0009
- DRVOPEN EQU $000A
- DRVINIT EQU $0010
- MSCPLAY EQU $0011
- MSCPLAY1 EQU $0012
- MSCPLAYR EQU $0013
- MSCPLAYT EQU $0014
- MSCSEEK EQU $0015
- MSCSEEKT EQU $0016
- ROMREAD EQU $0017
- ROMSEEK EQU $0018
- MSCSEEK1 EQU $0019
- TESTENTRY EQU $001E
- TESTENTRYLOOP EQU $001F
- ROMREADN EQU $0020
- ROMREADE EQU $0021
- CDBCHK EQU $0080
- CDBSTAT EQU $0081
- CDBTOCWRITE EQU $0082
- CDBTOCREAD EQU $0083
- CDBPAUSE EQU $0084
- FDRSET EQU $0085
- FDRCHG EQU $0086
- CDCSTART EQU $0087
- CDCSTARTP EQU $0088
- CDCSTOP EQU $0089
- CDCSTAT EQU $008A
- CDCREAD EQU $008B
- CDCTRN EQU $008C
- CDCACK EQU $008D
- SCDINIT EQU $008E
- SCDSTART EQU $008F
- SCDSTOP EQU $0090
- SCDSTAT EQU $0091
- SCDREAD EQU $0092
- SCDPQ EQU $0093
- SCDPQL EQU $0094
- LEDSET EQU $0095
- CDCSETMODE EQU $0096
- WONDERREQ EQU $0097
- WONDERCHK EQU $0098
- CBTINIT EQU $0000
- CBTINT EQU $0001
- CBTOPENDISC EQU $0002
- CBTOPENSTAT EQU $0003
- CBTCHKDISC EQU $0004
- CBTCHKSTAT EQU $0005
- CBTIPDISC EQU $0006
- CBTIPSTAT EQU $0007
- CBTSPDISC EQU $0008
- CBTSPSTAT EQU $0009
- BRMINIT EQU $0000
- BRMSTAT EQU $0001
- BRMSERCH EQU $0002
- BRMREAD EQU $0003
- BRMWRITE EQU $0004
- BRMDEL EQU $0005
- BRMFORMAT EQU $0006
- BRMDIR EQU $0007
- BRMVERIFY EQU $0008
- ;-----------------------------------------------------------------------
- ; BIOS ENTRY POINTS
- ;-----------------------------------------------------------------------
- _ADRERR EQU $00005F40
- _BOOTSTAT EQU $00005EA0
- _BURAM EQU $00005F16
- _CDBIOS EQU $00005F22
- _CDBOOT EQU $00005F1C
- _CDSTAT EQU $00005E80
- _CHKERR EQU $00005F52
- _CODERR EQU $00005F46
- _DEVERR EQU $00005F4C
- _LEVEL1 EQU $00005F76
- _LEVEL2 EQU $00005F7C
- _LEVEL3 EQU $00005F82 ;TIMER INTERRUPT
- _LEVEL4 EQU $00005F88
- _LEVEL5 EQU $00005F8E
- _LEVEL6 EQU $00005F94
- _LEVEL7 EQU $00005F9A
- _NOCOD0 EQU $00005F6A
- _NOCOD1 EQU $00005F70
- _SETJMPTBL EQU $00005F0A
- _SPVERR EQU $00005F5E
- _TRACE EQU $00005F64
- _TRAP00 EQU $00005FA0
- _TRAP01 EQU $00005FA6
- _TRAP02 EQU $00005FAC
- _TRAP03 EQU $00005FB2
- _TRAP04 EQU $00005FB8
- _TRAP05 EQU $00005FBE
- _TRAP06 EQU $00005FC4
- _TRAP07 EQU $00005FCA
- _TRAP08 EQU $00005FD0
- _TRAP09 EQU $00005FD6
- _TRAP10 EQU $00005FDC
- _TRAP11 EQU $00005FE2
- _TRAP12 EQU $00005FE8
- _TRAP13 EQU $00005FEE
- _TRAP14 EQU $00005FF4
- _TRAP15 EQU $00005FFA
- _TRPERR EQU $00005F58
- _USERCALL0 EQU $00005F28 ;INIT
- _USERCALL1 EQU $00005F2E ;MAIN
- _USERCALL2 EQU $00005F34 ;VINT
- _USERCALL3 EQU $00005F3A ;NOT DEFINED
- _USERMODE EQU $00005EA6
- _WAITVSYNC EQU $00005F10
- ;-----------------------------------------------------------------------
- ; CDBIOS - Calls the BIOS with a specified function number. Assumes
- ; that all preparatory and cleanup work is done externally.
- ;
- ; input:
- ; fcode BIOS function code
- ;
- ; returns:
- ; nothing
- ;-----------------------------------------------------------------------
- CDBIOS macro fcode
- move.w \fcode,d0
- jsr _CDBIOS
- endm
- ;-----------------------------------------------------------------------
- ; BURAM - Calls the Backup Ram with a specified function number.
- ; Assumes that all preparatory and cleanup work is done externally.
- ;
- ; input:
- ; fcode Backup Ram function code
- ;
- ; returns:
- ; nothing
- ;-----------------------------------------------------------------------
- BURAM macro fcode
- move.w \fcode,d0
- jsr _BURAM
- endm
- ;-----------------------------------------------------------------------
- ; DRIVE MECHANISM
- ;-----------------------------------------------------------------------
- ;-----------------------------------------------------------------------
- ; BIOS_DRVINIT - Closes the disk tray and reads the TOC from the CD.
- ; Pauses for 2 seconds after reading the TOC. If bit 7 of the TOC track
- ; is set, the BIOS starts playing the first track automatically. Waits
- ; for a DRVOPEN request if there is no disk in the drive.
- ;
- ; input:
- ; a0.l address of initialization parameters:
- ; dc.b $01 ; Track # to read TOC from (normally $01)
- ; dc.b $FF ; Last track # ($FF = read all tracks)
- ;
- ; returns:
- ; nothing
- ;-----------------------------------------------------------------------
- BIOS_DRVINIT macro
- CDBIOS #DRVINIT
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_DRVOPEN - Opens the drive.
- ;
- ; input:
- ; none
- ;
- ; returns:
- ; nothing
- ;-----------------------------------------------------------------------
- BIOS_DRVOPEN macro
- CDBIOS #DRVOPEN
- endm
- ;-----------------------------------------------------------------------
- ; MUSIC
- ;-----------------------------------------------------------------------
- ;-----------------------------------------------------------------------
- ; BIOS_MSCSTOP - Stops playing a track if it's currently playing.
- ;
- ; input:
- ; none
- ;
- ; returns:
- ; nothing
- ;-----------------------------------------------------------------------
- BIOS_MSCSTOP macro
- CDBIOS #MSCSTOP
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_MSCPLAY - Starts playing at a specified track. Continues playing
- ; through subsequent tracks.
- ;
- ; input:
- ; a0.l address of 16 bit track number
- ;
- ; returns:
- ; nothing
- ;-----------------------------------------------------------------------
- BIOS_MSCPLAY macro
- CDBIOS #MSCPLAY
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_MSCPLAY1 - Plays a track once and pauses.
- ;
- ; input:
- ; a0.l address of a 16 bit track number
- ;
- ; returns:
- ; nothing
- ;-----------------------------------------------------------------------
- BIOS_MSCPLAY1 macro
- CDBIOS #MSCPLAY1
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_MSCPLAYR - Plays the designated track repeatedly.
- ;
- ; input:
- ; a0.l address of a 16 bit track number
- ;
- ; returns:
- ; nothing
- ;-----------------------------------------------------------------------
- BIOS_MSCPLAYR macro
- CDBIOS #MSCPLAYR
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_MSCPLAYT - Starts playing from a specified time.
- ;
- ; input:
- ; a0.l address of a 32 bit BCD time code in the format mm:ss:ff:00
- ;
- ; returns:
- ; nothing
- ;-----------------------------------------------------------------------
- BIOS_MSCPLAYT macro
- CDBIOS #MSCPLAYT
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_MSCSEEK - Seeks to the beginning of the selected track and pauses.
- ;
- ; input:
- ; a0.l address of a 16 bit track number
- ;
- ; returns:
- ; nothing
- ;-----------------------------------------------------------------------
- BIOS_MSCSEEK macro
- CDBIOS #MSCSEEK
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_MSCSEEK1 - Seeks to the beginning of the selected track and pauses.
- ; Once the BIOS detects a pause state, it plays the track once.
- ;
- ; input:
- ; a0.l address of a 16 bit track number
- ;
- ; returns:
- ; nothing
- ;-----------------------------------------------------------------------
- BIOS_MSCSEEK1 macro
- CDBIOS #MSCSEEK1
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_MSCSEEKT - Seeks to a specified time.
- ;
- ; input:
- ; a0.l address of a 32 bit BCD time code in the format mm:ss:ff:00
- ;
- ; returns:
- ; nothing
- ;-----------------------------------------------------------------------
- BIOS_MSCSEEKT macro
- CDBIOS #MSCSEEKT
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_MSCPAUSEON - Pauses the drive when a track is playing. If the
- ; drive is left paused it will stop after a programmable delay (see
- ; CDBPAUSE).
- ;
- ; input:
- ; none
- ;
- ; returns:
- ; nothing
- ;-----------------------------------------------------------------------
- BIOS_MSCPAUSEON macro
- CDBIOS #MSCPAUSEON
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_MSCPAUSEOFF - Resumes playing a track after a pause. If the drive
- ; has timed out and stopped, the BIOS will seek to the pause time (with
- ; the attendant delay) and resume playing.
- ;
- ; input:
- ; none
- ;
- ; returns:
- ; nothing
- ;-----------------------------------------------------------------------
- BIOS_MSCPAUSEOFF macro
- CDBIOS #MSCPAUSEOFF
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_MSCSCANFF - Starts playing from the current position in fast
- ; forward.
- ;
- ; input:
- ; none
- ;
- ; returns:
- ; nothing
- ;-----------------------------------------------------------------------
- BIOS_MSCSCANFF macro
- CDBIOS #MSCSCANFF
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_MSCSCANFR - Same as MSCSCANFF, but backwards.
- ;
- ; input:
- ; none
- ;
- ; returns:
- ; nothing
- ;-----------------------------------------------------------------------
- BIOS_MSCSCANFR macro
- CDBIOS #MSCSCANFR
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_MSCSCANOFF - Returns to normal play mode. If the drive was
- ; paused before the scan was initiated, it will be returned to pause.
- ;
- ; input:
- ; none
- ;
- ; returns:
- ; nothing
- ;-----------------------------------------------------------------------
- BIOS_MSCSCANOFF macro
- CDBIOS #MSCSCANOFF
- endm
- ;-----------------------------------------------------------------------
- ; CD-ROM
- ;-----------------------------------------------------------------------
- ;-----------------------------------------------------------------------
- ; BIOS_ROMREAD - Begins reading data from the CDROM at the designated
- ; logical sector. Executes a CDCSTART to begin the read, but doesn't
- ; stop automatically.
- ;
- ; Note - ROMREAD actually pre-seeks by 2 sectors, but doesn't start
- ; passing data to the CDC until the desired sector is reached.
- ;
- ; input:
- ; a0.l address of a 32 bit logical sector number
- ;
- ; returns:
- ; nothing
- ;-----------------------------------------------------------------------
- BIOS_ROMREAD macro
- CDBIOS #ROMREAD
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_ROMREADN - Same as ROMREAD, but stops after reading the requested
- ; number of sectors.
- ;
- ; input:
- ; a0.l address of a 32 bit sector number and 32 bit sector count
- ; dc.l $00000001 ; First sector to read
- ; dc.l $00001234 ; Number of sectors to read
- ;
- ; returns:
- ; nothing
- ;-----------------------------------------------------------------------
- BIOS_ROMREADN macro
- CDBIOS #ROMREADN
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_ROMREADE - Same as ROMREAD, but reads between two logical sectors.
- ;
- ; input:
- ; a0.l address of table of 32 bit logical sector numbers
- ; dc.l $00000001 ; First sector to read
- ; dc.l $00000123 ; Last sector to read
- ;
- ; returns:
- ; nothing
- ;-----------------------------------------------------------------------
- BIOS_ROMREADE macro
- CDBIOS #ROMREADE
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_ROMSEEK - Seeks to the designated logical sector and pauses.
- ;
- ; input:
- ; a0.l address of a 32 bit logical sector number
- ;
- ; returns:
- ; nothing
- ;-----------------------------------------------------------------------
- BIOS_ROMSEEK macro
- CDBIOS #ROMSEEK
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_ROMPAUSEON - Stops reading data into the CDC and pauses.
- ;
- ; input:
- ; none
- ;
- ; returns:
- ; nothing
- ;-----------------------------------------------------------------------
- BIOS_ROMPAUSEON macro
- CDBIOS #ROMPAUSEON
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_ROMPAUSEOFF - Resumes reading data into the CDC from the current
- ; logical sector.
- ;
- ; input:
- ; none
- ;
- ; returns:
- ; nothing
- ;-----------------------------------------------------------------------
- BIOS_ROMPAUSEOFF macro
- CDBIOS #ROMPAUSEOFF
- endm
- ;-----------------------------------------------------------------------
- ; MISC BIOS FUNCTIONS
- ;-----------------------------------------------------------------------
- ;-----------------------------------------------------------------------
- ; BIOS_CDBCHK - Querys the BIOS on the status of the last command.
- ; Returns success if the command has been executed, not if it's complete.
- ; This means that CDBCHK will return success on a seek command once the
- ; seek has started, NOT when the seek is actually finished.
- ;
- ; input:
- ; none
- ;
- ; returns:
- ; cc Command has been executed
- ; cs BIOS is busy
- ;-----------------------------------------------------------------------
- BIOS_CDBCHK macro
- CDBIOS #CDBCHK
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_CDBSTAT
- ;
- ; input:
- ; none
- ;
- ; returns:
- ; a0.l address of BIOS status table
- ;-----------------------------------------------------------------------
- BIOS_CDBSTAT macro
- CDBIOS #CDBSTAT
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_CDBTOCREAD - Gets the time for the specified track from the TOC.
- ; If the track isn't in the TOC, the BIOS will either return the time of
- ; the last track read or the beginning of the disk. Don't call this
- ; function while the BIOS is loading the TOC (see DRVINIT).
- ;
- ; input:
- ; d1.w 16 bit track number
- ;
- ; returns:
- ; d0.l BCD time of requested track in mm:ss:ff:## format where ## is
- ; the requested track number or 00 if there was an error
- ;
- ; d1.b Track type:
- ; $00 = CD-DA track
- ; $FF = CD-ROM track
- ;-----------------------------------------------------------------------
- BIOS_CDBTOCREAD macro
- CDBIOS #CDBTOCREAD
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_CDBTOCWRITE - Writes data to the TOC in memory. Don't write to
- ; the TOC while the BIOS is performing a DRVINIT.
- ;
- ; input:
- ; a0.l address of a table of TOC entries to write to the TOC. Format
- ; of the entries is mm:ss:ff:## where ## is the track number.
- ;
- ; returns:
- ; nothing
- ;-----------------------------------------------------------------------
- BIOS_CDBTOCWRITE macro
- CDBIOS #CDBTOCWRITE
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_CDBPAUSE - Sets the delay time before the BIOS switches from
- ; pause to standby. Normal ranges for this delay time are $1194 - $FFFE.
- ; A delay of $FFFF prevents the drive from stopping, but can damage the
- ; drive if used improperly.
- ;
- ; input:
- ; d1.w 16 bit delay time
- ;
- ; returns:
- ; nothing
- ;-----------------------------------------------------------------------
- BIOS_CDBPAUSE macro
- CDBIOS #CDBPAUSE
- endm
- ;-----------------------------------------------------------------------
- ; FADER
- ;-----------------------------------------------------------------------
- ;-----------------------------------------------------------------------
- ; BIOS_FDRSET - Sets the audio volume. If bit 15 of the volume parameter
- ; is 1, sets the master volume level. There's a delay of up to 13ms
- ; before the volume begins to change and another 23ms for the new volume
- ; level to take effect. The master volume sets a maximum level which the
- ; volume level can't exceed.
- ;
- ; input:
- ; d1.w 16 bit volume ($0000 = min $0400 = max)
- ; 16 bit master volume ($8000 = min $8400 = max)
- ;
- ; returns:
- ; nothing
- ;-----------------------------------------------------------------------
- BIOS_FDRSET macro
- CDBIOS #FDRSET
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_FDRCHG - Ramps the audio volume from its current level to a new
- ; level at the requested rate. As in FDRSET, there's a delay of up to
- ; 13ms before the change starts.
- ;
- ; input:
- ; d1.l 32 bit volume change
- ; high word: new 16 bit volume ($0000 = min $0400 = max)
- ; low word: 16 bit rate in steps/vblank
- ; $0001 = slow
- ; $0200 = fast
- ; $0400 = set immediately
- ;
- ; returns:
- ; nothing
- ;-----------------------------------------------------------------------
- BIOS_FDRCHG macro
- CDBIOS #FDRCHG
- endm
- ;-----------------------------------------------------------------------
- ; CDC
- ;-----------------------------------------------------------------------
- ;-----------------------------------------------------------------------
- ; BIOS_CDCSTART - Starts reading data from the current logical sector
- ; into the CDC. The BIOS pre-seeks by 2 to 4 sectors and data read
- ; actually begins before the requested sector. It's up to the caller
- ; to identify the correct starting sector (usually by checking the time
- ; codes in the headers as they're read from the CDC buffer).
- ;
- ; input:
- ; none
- ;
- ; returns:
- ; nothing
- ;-----------------------------------------------------------------------
- BIOS_CDCSTART macro
- CDBIOS #CDCSTART
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_CDCSTOP - Stops reading data into the CDC. If a sector is being
- ; read when CDCSTOP is called, it's lost.
- ;
- ; input:
- ; none
- ;
- ; returns:
- ; nothing
- ;-----------------------------------------------------------------------
- BIOS_CDCSTOP macro
- CDBIOS #CDCSTOP
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_CDCSTAT - Queries the CDC buffer. If no sector is ready for
- ; read, the carry bit will be set. Up to 5 sectors can be buffered in
- ; the CDC buffer.
- ;
- ; input:
- ; none
- ;
- ; returns:
- ; cc Sector available for read
- ; cs No sectors available
- ;-----------------------------------------------------------------------
- BIOS_CDCSTAT macro
- CDBIOS #CDCSTAT
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_CDCREAD - If a sector is ready in the CDC buffer, the BIOS
- ; prepares to send the sector to the current device destination. Make
- ; sure to set the device destination BEFORE calling CDCREAD. If a
- ; sector is ready, the carry bit will be cleared on return and it's
- ; necessary to respond with a call to CDCACK.
- ;
- ; input:
- ; none
- ;
- ; returns:
- ; cc Sector ready for transfer
- ; d0.l Sector header in BCD mm:ss:ff:md format where md is sector mode
- ; $00 = CD-DA
- ; $01 = CD-ROM mode 1
- ; $02 = CD-ROM mode 2
- ; cs Sector not ready
- ;-----------------------------------------------------------------------
- BIOS_CDCREAD macro
- CDBIOS #CDCREAD
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_CDCTRN - Uses the Sub-CPU to read one sector into RAM. The
- ; device destination must be set to SUB-CPU read before calling CDCTRN.
- ;
- ; input:
- ; a0.l address of sector destination buffer (at least 2336 bytes)
- ; a1.l address of header destination buffer (at least 4 bytes)
- ;
- ; returns:
- ; cc Sector successfully transferred
- ; cs Transfer failed
- ; a0.l Next sector destination address (a0 + 2336)
- ; a1.l Next header destination address (a1 + 4)
- ;-----------------------------------------------------------------------
- BIOS_CDCTRN macro
- CDBIOS #CDCTRN
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_CDCACK - Informs the CDC that the current sector has been read
- ; and the caller is ready for the next sector.
- ;
- ; input:
- ; none
- ;
- ; returns:
- ; nothing
- ;-----------------------------------------------------------------------
- BIOS_CDCACK macro
- CDBIOS #CDCACK
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_CDCSETMODE - Tells the BIOS which mode to read the CD in. Accepts
- ; bit flags that allow selection of the three basic CD modes as follows:
- ;
- ; Mode 0 (CD-DA) 2
- ; Mode 1 (CD-ROM with full error correction) 0
- ; Mode 2 (CD-ROM with CRC only) 1
- ;
- ; input:
- ; d1.w FEDCBA9876543210
- ; ||||
- ; |||+--> CD Mode 2
- ; ||+---> CD-DA mode
- ; |+----> transfer error block with data
- ; +-----> re-read last data
- ;
- ; returns:
- ; nothing
- ;-----------------------------------------------------------------------
- BIOS_CDCSETMODE macro
- CDBIOS #CDCSETMODE
- endm
- ;-----------------------------------------------------------------------
- ; SUBCODES
- ;-----------------------------------------------------------------------
- ;-----------------------------------------------------------------------
- ; BIOS_SCDINIT - Initializes the BIOS for subcode reads.
- ;
- ; input:
- ; a0.l address of scratch buffer (at least $750 long)
- ;
- ; returns:
- ; nothing
- ;-----------------------------------------------------------------------
- BIOS_SCDINIT macro
- CDBIOS #SCDINIT
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_SCDSTART - Enables reading of subcode data by the CDC.
- ;
- ; input:
- ; d1.w Subcode processing mode
- ; 0 = --------
- ; 1 = --RSTUVW
- ; 2 = PQ------
- ; 3 = PQRSTUVW
- ;
- ; returns:
- ; nothing
- ;-----------------------------------------------------------------------
- BIOS_SCDSTART macro
- CDBIOS #SCDSTART
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_SCDSTOP - Disables reading of subcode data by the CDC.
- ;
- ; input:
- ; none
- ;
- ; returns:
- ; nothing
- ;-----------------------------------------------------------------------
- BIOS_SCDSTOP macro
- CDBIOS #SCDSTOP
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_SCDSTAT - Checks subcode error status.
- ;
- ; input:
- ; none
- ;
- ; returns:
- ; d0.l errqcodecrc / errpackcirc / scdflag / restrcnt
- ; d1.l erroverrun / errpacketbufful / errqcodefufful / errpackfufful
- ;-----------------------------------------------------------------------
- BIOS_SCDSTAT macro
- CDBIOS #SCDSTAT
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_SCDREAD - Reads R through W subcode channels.
- ;
- ; input:
- ; a0.l address of subcode buffer (24 bytes minimum)
- ;
- ; returns:
- ; cc Read successful
- ; cs Read failed
- ; a0.l address of next subcode buffer (a0.l + 24)
- ;-----------------------------------------------------------------------
- BIOS_SCDREAD macro
- CDBIOS #SCDREAD
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_SCDPQ - Gets P & Q codes from subcode.
- ;
- ; input:
- ; a0.l address of Q code buffer (12 bytes minimum)
- ;
- ; returns:
- ; cc Read successful
- ; cs Read failed
- ; a0.l address of next Q code buffer (a0.l + 12)
- ;-----------------------------------------------------------------------
- BIOS_SCDPQ macro
- CDBIOS #SCDPQ
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_SCDPQL - Gets the last P & Q codes.
- ;
- ; input:
- ; a0.l address of Q code buffer (12 bytes minimum)
- ;
- ; returns:
- ; cc Read successful
- ; cs Read failed
- ; a0.l address of next Q code buffer (a0.l + 12)
- ;-----------------------------------------------------------------------
- BIOS_SCDPQL macro
- CDBIOS #SCDPQL
- endm
- ;-----------------------------------------------------------------------
- ; FRONT PANEL LEDS
- ;-----------------------------------------------------------------------
- ;-----------------------------------------------------------------------
- ; BIOS_LEDSET - Controls the Ready and Access LED's on the front panel
- ; of the CD unit.
- ;
- ; input:
- ; d1.w MODE Ready (green) Access (red) System Indication
- ; ---------------------------------------------------------------
- ; off off only at reset
- ; LEDREADY (0) on blink CD ready / no disk
- ; LEDDISCIN (1) on off CD ready / disk ok
- ; LEDACCESS (2) on on CD accessing
- ; LEDSTANDBY (3) blink off standby mode
- ; LEDERROR (4) blink blink reserved
- ; LEDMODE5 (5) blink on reserved
- ; LEDMODE6 (6) off blink reserved
- ; LEDMODE7 (7) off on reserved
- ; LEDSYSTEM (?) rtn ctrl to BIOS
- ;
- ; returns:
- ; nothing
- ;-----------------------------------------------------------------------
- BIOS_LEDSET macro
- CDBIOS #LEDSET
- endm
- ;-----------------------------------------------------------------------
- ; Back-Up RAM
- ;-----------------------------------------------------------------------
- ;-----------------------------------------------------------------------
- ; NOTE: The backup ram on the super target devlopment systems is write
- ; protected if the production Boot Rom is being used. A
- ; Development Boot Rom must be obtained before the backup ram can
- ; be used.
- ;
- ; The name of the save game files must be registered with SOJ before
- ; a game can be shipped.
- ;
- ; Please make sure to read the CD Software Standards section in the
- ; manual. There is a section on backup ram standards that must be
- ; followed.
- ;
- ; For a full description of each Back-Up Ram function, see the BIOS
- ; section of the CD manual.
- ;
- ; Some of the Back-Up RAM functions require a string buffer to
- ; be passed into the function. Some of these functions return
- ; 0 terminated text strings.
- ;-------------------------------------------------------------------------
- ;-----------------------------------------------------------------------
- ; BIOS_BRMINIT - Prepares to write into and read from Back-Up Ram.
- ;
- ; input:
- ; a0.l pointer to scratch ram (size $640 bytes).
- ;
- ; a1.l pointer to the buffer for display strings (size: 12 bytes)
- ;
- ; returns:
- ; cc SEGA formatted RAM is present
- ; cs Not formatted or no RAM
- ; d0.w size of backup RAM $2(000) ~ $100(000) bytes
- ; d1.w 0 : No RAM
- ; 1 : Not Formatted
- ; 2 : Other Format
- ; a1.l pointer to display strings
- ;-----------------------------------------------------------------------
- BIOS_BRMINIT macro
- BURAM #BRMINIT
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_BRMSTAT - Returns how much Back-Up RAM has been used.
- ;
- ; input:
- ; a1.l pointer to display string buffer (size: 12 bytes)
- ;
- ; returns:
- ; d0.w number of blocks of free area
- ; d1.w number of files in directory
- ;-----------------------------------------------------------------------
- BIOS_BRMSTAT macro
- BURAM #BRMSTAT
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_BRMSERCH - Searches for the desired file in Back-Up Ram. The file
- ; names are 11 ASCII characters terminated with a 0.
- ;
- ; input:
- ; a0.l pointer to parameter (file name) table
- ; file name = 11 ASCII chars [0~9 A~Z_] 0 terminated
- ;
- ; returns:
- ; cc file name found
- ; cs file name not found
- ; d0.w number of blocks
- ; d1.b MODE
- ; 0 : normal
- ; -1 : data protected (with protect function)
- ; a0.l backup ram start address for search
- ;-----------------------------------------------------------------------
- BIOS_BRMSERCH macro
- BURAM #BRMSERCH
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_BRMREAD - reads data from Back-Up RAM.
- ;
- ; input:
- ; a0.l pointer to parameter (file name) table
- ; a1.l pointer to write buffer
- ;
- ; returns:
- ; cc Read Okay
- ; cs Error
- ; d0.w number of blocks
- ; d1.b MODE
- ; 0 : normal
- ; -1 : data protected
- ;-----------------------------------------------------------------------
- BIOS_BRMREAD macro
- BURAM #BRMREAD
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_BRMWRITE - Writes data in Back-Up RAM.
- ;
- ; input:
- ; a0.l pointer to parameter (file name) table
- ; flag.b $00: normal
- ; $FF: encoded (with protect function)
- ; block_size.w $00: 1 block = $40 bytes
- ; $FF: 1 block = $20 bytes
- ; a1.l pointer to save data
- ;
- ; returns:
- ; cc Okay, complete
- ; cs Error, cannot write in the file
- ;-----------------------------------------------------------------------
- BIOS_BRMWRITE macro
- BURAM #BRMWRITE
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_BRMDEL - Deletes data on Back-Up Ram.
- ;
- ; input:
- ; a0.l pointer to parameter (file name) table
- ;
- ; returns:
- ; cc deleted
- ; cs not found
- ;-----------------------------------------------------------------------
- BIOS_BRMDEL macro
- BURAM #BRMDEL
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_BRMFORMAT - First initializes the directory and then formats the
- ; Back-Up RAM
- ;
- ; Call BIOS_BRMINIT before calling this function
- ;
- ; input:
- ; none
- ;
- ; returns:
- ; cc Okay, formatted
- ; cs Error, cannot format
- ;-----------------------------------------------------------------------
- BIOS_BRMFORMAT macro
- BURAM #BRMFORMAT
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_BRMDIR - Reads directory
- ;
- ; input:
- ; d1.l H: number of files to skip when all files cannot be read in one try
- ; L: size of directory buffer (# of files that can be read in the
- ; directory buffer)
- ; a0.l pointer to parameter (file name) table
- ; a1.l pointer to directory buffer
- ;
- ; returns:
- ; cc Okay, complete
- ; cs Full, too much to read into directory buffer
- ;-----------------------------------------------------------------------
- BIOS_BRMDIR macro
- BURAM #BRMDIR
- endm
- ;-----------------------------------------------------------------------
- ; BIOS_BRMVERIFY - Checks data written on Back-Up Ram.
- ;
- ; input:
- ; a0.l pointer to parameter (file name) table
- ; flag.b $00: normal
- ; $FF: encoded (with protect function)
- ; block_size.w $00: 1 block = $40 bytes
- ; $FF: 1 block = $20 bytes
- ; a1.l pointer to save data
- ;
- ; returns:
- ; cc Okay
- ; cs Error
- ; d0.w Error Number
- ; -1 : Data does not match
- ; 0 : File not found
- ;-----------------------------------------------------------------------
- BIOS_BRMVERIFY macro
- BURAM #BRMVERIFY
- endm
- endif
- ;-----------------------------------------------------------------------;
- ; File Name - CDBIOS.INC ;
- ; End of file ;
- ;-----------------------------------------------------------------------;
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