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
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.EQU noQueueBit, 9
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.EQU kioTrap, 6
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.EQU kioResult, 16
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.EQU kcsCode, 26
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.EQU JIODone, 0x08FC
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.GLOBAL RDiskSig
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.GLOBAL RDiskDBGNamePos
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.GLOBAL RDiskDBGDisPos
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.GLOBAL RDiskDBGDisByte
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.GLOBAL RDiskCDRNamePos
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.GLOBAL RDiskCDRDisPos
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.GLOBAL RDiskCDRDisByte
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dc.l 0x00000000, 0x00000000, 0x00000000, 0x00000000
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dc.l 0x00000000, 0x00000000, 0x00000000, 0x00000000
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RDiskSig:
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.ascii "\5RDisk\0"
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.align 4
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RDiskDBGDisPos:
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dc.l 0x00000031
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RDiskCDRDisPos:
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dc.l 0x00012CAF
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RDiskDBGNameAddr:
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dc.l 0x4088002A
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RDiskCDRNameAddr:
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dc.l 0x40892C96
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RDiskDBGDisByte:
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dc.b 0x44
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RDiskCDRDisByte:
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dc.b 0x44
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RDiskRAMRequired:
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.ascii "16"
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.align 4
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DOpen:
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movem.l %A0-%A1, -(%SP)
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bsr RDOpen
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movem.l (%SP)+, %A0-%A1
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rts
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DClose:
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movem.l %A0-%A1, -(%SP)
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bsr RDClose
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movem.l (%SP)+, %A0-%A1
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rts
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DPrime:
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movem.l %A0-%A1, -(%SP)
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bsr RDPrime
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movem.l (%SP)+, %A0-%A1
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bra.b IOReturn
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DControl:
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movem.l %A0-%A1, -(%SP)
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bsr RDCtl
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movem.l (%SP)+, %A0-%A1
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cmpi.w #killCode, kcsCode(%A0)
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bne.b IOReturn
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rts
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DStatus:
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movem.l %A0-%A1, -(%SP)
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bsr RDStat
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movem.l (%SP)+, %A0-%A1
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IOReturn:
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move.w kioTrap(%A0), %D1
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btst #noQueueBit, %D1
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beq.b Queued
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NotQueued:
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tst.w %D0
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ble.b ImmedRTS
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clr.w %D0
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ImmedRTS:
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move.w %D0, kioResult(%A0)
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rts
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Queued:
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move.l JIODone, -(%SP)
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rts
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