mirror of
https://github.com/garrettsworkshop/MacIIROMDiskDriver.git
synced 2024-11-21 12:30:49 +00:00
85 lines
1.3 KiB
ArmAsm
85 lines
1.3 KiB
ArmAsm
.EQU killCode, 1
|
|
.EQU noQueueBit, 9
|
|
.EQU kioTrap, 6
|
|
.EQU kioResult, 16
|
|
.EQU kcsCode, 26
|
|
.EQU JIODone, 0x08FC
|
|
.GLOBAL RDiskSig
|
|
.GLOBAL RDiskDBGNamePos
|
|
.GLOBAL RDiskDBGDisPos
|
|
.GLOBAL RDiskDBGDisByte
|
|
.GLOBAL RDiskCDROMNamePos
|
|
.GLOBAL RDiskCDROMDisPos
|
|
.GLOBAL RDiskCDROMDisByte
|
|
|
|
dc.l 0x00000000, 0x00000000, 0x00000000, 0x00000000
|
|
dc.l 0x00000000, 0x00000000, 0x00000000, 0x00000000
|
|
|
|
RDiskSig:
|
|
.ascii "\5RDisk\0"
|
|
.align 4
|
|
RDiskDBGDisPos:
|
|
dc.l 0x00000031
|
|
RDiskCDROMDisPos:
|
|
dc.l 0x00012CAF
|
|
RDiskDBGNameAddr:
|
|
dc.l 0x4088002A
|
|
RDiskCDROMNameAddr:
|
|
dc.l 0x40892C96
|
|
RDiskDBGDisByte:
|
|
dc.b 0x44
|
|
RDiskCDROMDisByte:
|
|
dc.b 0x44
|
|
RDiskRAMRequired:
|
|
.ascii "16"
|
|
|
|
.align 4
|
|
DOpen:
|
|
movem.l %A0-%A1, -(%SP)
|
|
bsr RDOpen
|
|
movem.l (%SP)+, %A0-%A1
|
|
rts
|
|
|
|
DClose:
|
|
movem.l %A0-%A1, -(%SP)
|
|
bsr RDClose
|
|
movem.l (%SP)+, %A0-%A1
|
|
rts
|
|
|
|
DPrime:
|
|
movem.l %A0-%A1, -(%SP)
|
|
bsr RDPrime
|
|
movem.l (%SP)+, %A0-%A1
|
|
bra.b IOReturn
|
|
|
|
DControl:
|
|
movem.l %A0-%A1, -(%SP)
|
|
bsr RDCtl
|
|
movem.l (%SP)+, %A0-%A1
|
|
cmpi.w #killCode, kcsCode(%A0)
|
|
bne.b IOReturn
|
|
rts
|
|
|
|
DStatus:
|
|
movem.l %A0-%A1, -(%SP)
|
|
bsr RDStat
|
|
movem.l (%SP)+, %A0-%A1
|
|
|
|
IOReturn:
|
|
move.w kioTrap(%A0), %D1
|
|
btst #noQueueBit, %D1
|
|
beq.b Queued
|
|
|
|
NotQueued:
|
|
tst.w %D0
|
|
ble.b ImmedRTS
|
|
clr.w %D0
|
|
|
|
ImmedRTS:
|
|
move.w %D0, kioResult(%A0)
|
|
rts
|
|
|
|
Queued:
|
|
move.l JIODone, -(%SP)
|
|
rts
|