mirror of
https://github.com/A2osX/A2osX.git
synced 2024-11-25 20:33:13 +00:00
590 lines
9.1 KiB
Plaintext
590 lines
9.1 KiB
Plaintext
NEW
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AUTO 3,1
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*/--------------------------------------
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*\--------------------------------------
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D2.MotorControl >PULLB D2.MotorOn
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>PULLB D2.DrvSlt
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jsr D2.CheckDiskII
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bcs .9
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lda D2.MotorOn
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asl
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lda #IO.D2.DrvOff
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adc D2.Slotn0
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tax
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lda $C000,x
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clc
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.9 rts
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*/--------------------------------------
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*\--------------------------------------
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D2.Recalibrate >PULLB D2.DrvSlt
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jsr D2.CheckDiskII
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bcs .9
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lda #168
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ldy D2.Slotn0
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lda IO.D2.Ph0On,y
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lda #IO.D2.SeekTimeR
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jsr D2.Wait100usecA
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.1 dec
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dec
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pha
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and #6
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ora D2.Slotn0
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phy
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plx
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tay
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lda IO.D2.Ph0On,y
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lda #IO.D2.SeekTimeR
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jsr D2.Wait100usecA
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lda IO.D2.Ph0Off,x
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lda #IO.D2.SeekTimeR
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jsr D2.Wait100usecA
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pla
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bne .1
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jsr D2.Wait25600usec
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lda IO.D2.Ph0Off,y
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jsr D2.Wait25600usec
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clc
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.9 rts
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*/--------------------------------------
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*\--------------------------------------
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D2.MoveHead >PULLB D2.TargetQTrack
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>PULLB D2.CurrentQTrack
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>PULLB D2.DrvSlt
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jsr D2.CheckDiskII
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bcs .9
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php
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sei
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jsr D2.MoveHead.SEI
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plp
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clc
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.9 rts
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D2.MoveHead.SEI lda D2.CurrentQTrack
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bit #1
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bne .1
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jsr D2.SeekPhOnY we are on 0/4 or 2/4 track
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bra .9 no wait, next operation will be phy/plx/Ph0On,y
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.1 cmp D2.TargetQTrack we are on 1/4 or 3/4
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bcs .2 if CS, C > T, must move out
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inc CC: C < T, ON next PH
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.HS B0 BCS
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.2 dec CS: C > T, ON prev PH
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sta D2.CurrentQTrack
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bra .6 Ph ON to go to 0/4 or 2/4, then wait
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*--------------------------------------
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.3 bcs .4 if CS, C > T, must move out
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inc CC: C < T, ON next PH
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.HS B0 BCS
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.4 dec CS: C > T, ON prev PH
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sta D2.CurrentQTrack
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bit #1
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bne .5
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lda IO.D2.Ph0Off,x we must go to 0/4 or 2/4 : Off Prev Ph
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bra .8 go wait....
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.5 phy we must go on 1/4 or 3/4
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plx Y already ON, -> X for Ph0Off,x
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bcs .6 if CS, C > T, must move out
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inc CC: C < T, ON next PH
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.6 jsr D2.SeekPhOnY now X and Y on
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.8 lda #IO.D2.SeekTimeF
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jsr D2.Wait100usecA ...wait...
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.9 lda D2.CurrentQTrack
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cmp D2.TargetQTrack
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bne .3
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lsr CS if X,Y on
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jsr D2.Wait25600usec
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bcc .90
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sta IO.D2.Ph0Off,x
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nop
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nop
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.90 lda IO.D2.Ph0Off,y
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rts
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*--------------------------------------
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D2.SeekPhOnY and #6
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ora D2.Slotn0
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tay
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lda IO.D2.Ph0On,y
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rts
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*/--------------------------------------
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* # D2TrkRead16s
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* Write a track (16 sectors)
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* PUSHB = DSSS0000
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* PUSHB = TrackNum * 4 : 0->136+
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* PUSHW = Ptr to 16*256 buffer
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* ## RETURN VALUE
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* CC : success, A = VolNum
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* CS : A = Error
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*\--------------------------------------
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D2.TrkRead16s >PULLW ZPPtr1
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>PULLB D2.TrkNum
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>PULLB D2.DrvSlt
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jsr D2.CheckDiskII
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bcs .9
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lda D2.VolNum
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clc
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.9
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D2.TrkRead16s.RTS
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rts
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*/--------------------------------------
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* # D2TrkWrite16s
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* Write a track (16 sectors)
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* PUSHB = DSSS0000
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* PUSHB = VolNum
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* PUSHB = HeadNum (0,1)
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* PUSHB = TrackNum * 4 : 0->136+
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* PUSHW = Ptr to 16*256 buffer
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* ## RETURN VALUE
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* CC : success
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* CS : A = Error
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*\--------------------------------------
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D2.TrkWrite16s >PULLW ZPPtr1
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>PULLB D2.TrkNum
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>PULLB D2.HeadNum
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>PULLB D2.VolNum
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>PULLB D2.DrvSlt
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jsr D2.CheckDiskII
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bcs D2.TrkRead16s.RTS
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>LDYAI TRACK16.LEN+256+1
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>SYSCALL2 GetMem
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bcs D2.TrkRead16s.RTS
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>STYA ZPPtr2
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stx D2.hTrkBuf
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stz D2.SectNum
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ldy #0 put 256 FF sync bytes for slooooow drives
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jsr D2.PutSyncBytePtr2
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ldy #TRACK16.GAP1
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jsr D2.PutSyncBytePtr2
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.1 jsr D2.PutAddrHeadPtr2
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jsr D2.HeaderCheckSum
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ldy #3
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.2 lda D2.Checksum,y
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jsr D2.PutByte44Ptr2
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dey
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bpl .2
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jsr D2.PutTailPtr2
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ldy #TRACK16.GAP2
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jsr D2.PutSyncBytePtr2
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jsr D2.PutDataHeadPtr2
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lda ZPPtr1+1
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bne .7
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ldy #$57
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ldx #2
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lda #$96
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.3 sta (ZPPtr2)
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inc ZPPtr2
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bne .4
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inc ZPPtr2+1
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.4 dey
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bne .3
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dex
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bne .3
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bra .8
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.7 jsr D2.PutData
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inc ZPPtr1+1
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.8 jsr D2.PutTailPtr2
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ldy #TRACK16.GAP3
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jsr D2.PutSyncBytePtr2
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inc D2.SectNum
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lda D2.SectNum
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cmp #16
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bne .1
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lda #0
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sta (ZPPtr2)
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bit D2.VolNum
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bvc .80
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jsr D2.HeadSelect
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.80 jsr D2.WriteTrackPtr2
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php
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pha
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lda D2.hTrkBuf
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>SYSCALL2 FreeMem
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pla
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plp
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rts
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*/--------------------------------------
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*\--------------------------------------
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D2.TrkReadNIB
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*/--------------------------------------
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* # D2TrkWriteNIB
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* Write a track (NIBBLE)
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* **In:**
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* PUSHB = DSSS0000
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* PUSHW = Ptr to NIBBLE buffer (0 ended)
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* ## RETURN VALUE
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* CC : success
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* CS : A = Error
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* A=0, currently starting/seeking...
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*\--------------------------------------
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D2.TrkWriteNIB >PULLW ZPPtr1
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>PULLB D2.DrvSlt
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jsr D2.CheckDiskII was it a DISK II ?
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bcs .9
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.9 rts
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*--------------------------------------
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* A=DSSS0000
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*--------------------------------------
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D2.CheckDiskII pha
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and #$70 only 0SSS
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sta D2.Slotn0
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lsr
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lsr
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lsr
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lsr
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ora #$C0 make Cn
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sta ZPPtr3+1
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stz ZPPtr3
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ldx #3 4 bytes to check
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.1 ldy DiskII.OFS,x
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.2 lda (ZPPtr3),y
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cmp DiskII.SIG,x
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bne .9
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dex
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bpl .1
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pla all bytes match, Disk II
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asl
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lda #0
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adc #IO.D2.DrvSel1
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adc D2.Slotn0
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tax
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lda $C000,x
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ldx D2.Slotn0
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lda IO.D2.ReadMode,x
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lda IO.D2.RData,x
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clc
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rts
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.9 pla
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lda #MLI.E.NODEV
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sec
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rts
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*--------------------------------------
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* A=DSSS0000
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*--------------------------------------
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D2.DrvSpinCheck ldy #0
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lda IO.D2.RData,x
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.1 pha
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pla
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cmp IO.D2.RData,x
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bne .8 spinning
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dey
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bne .1
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clc CC:not spinning
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rts
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.8 sec
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rts
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*--------------------------------------
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D2.HeadSelect lda D2.HeadNum A = 0/1
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asl A = 0/2
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ora D2.Slotn0
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tax x=n0/n2
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lda IO.D2.Ph0On,x
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lda IO.D2.Ph0On+4,x
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lda #1
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jsr D2.Wait100usecA
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lda IO.D2.Ph0Off,x
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lda IO.D2.Ph0Off+4,x
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rts
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*--------------------------------------
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D2.Wait25600usec
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lda #0
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D2.Wait100usecA phx
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.1 ldx #20 (2)
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.2 dex (2)
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bne .2 (3)
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dec (2)
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bne .1 (3)
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plx
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rts (6)
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*--------------------------------------
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D2.PutSyncBytePtr2
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lda #$7f
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.1 sta (ZPPtr2)
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inc ZPPtr2
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bne .2
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inc ZPPtr2+1
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.2 dey
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bne .1
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rts
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*--------------------------------------
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D2.PutAddrHeadPtr2
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ldy #2
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.1 lda ADDR.Head,y
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jsr D2.PutBytePtr2
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dey
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bpl .1
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rts
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*--------------------------------------
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D2.PutDataHeadPtr2
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ldy #2
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.1 lda DATA.Head,y
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jsr D2.PutBytePtr2
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dey
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bpl .1
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rts
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*--------------------------------------
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D2.PutTailPtr2 ldy #2
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.1 lda TAIL,y
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jsr D2.PutBytePtr2
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dey
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bpl .1
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rts
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*--------------------------------------
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D2.HeaderCheckSum
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lda D2.VolNum
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eor D2.TrkNum
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eor D2.SectNum
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sta D2.Checksum
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rts
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*--------------------------------------
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D2.PutData stz D2.Checksum
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lda ZPPtr1
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ldy ZPPtr1+1
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clc
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adc #86
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bcc .1
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iny
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clc
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.1 sta ZPPtr3
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sty ZPPtr3+1
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adc #86
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bcc .2
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iny
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.2 sta ZPPtr4
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sty ZPPtr4+1
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ldy #85
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.3 lda (ZPPtr1),y
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and #3
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tax
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lda D2.XX000000,x
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pha
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lda (ZPPtr3),y
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and #3
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tax
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pla
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ora D2.00XX0000,x
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pha
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lda (ZPPtr4),y
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and #3
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tax
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pla
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ora D2.0000XX00,x
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tax
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eor D2.Checksum
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sta D2.Checksum
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lda FC2Nib,x
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* jsr D2.PutBytePtr2
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sta (ZPPtr2)
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inc ZPPtr2
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bne .31
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inc ZPPtr2+1
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.31 dey
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bpl .3
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ldy #0
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.4 lda (ZPPtr1),y
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and #$FC
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tax
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eor D2.Checksum
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sta D2.Checksum
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lda FC2Nib,x
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* jsr D2.PutBytePtr2
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sta (ZPPtr2)
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inc ZPPtr2
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bne .41
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inc ZPPtr2+1
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.41 iny
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bne .4
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ldx D2.Checksum
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lda FC2Nib,x
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bra D2.PutBytePtr2
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*--------------------------------------
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D2.PutByte44Ptr2
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pha
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ror
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jsr .1
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pla
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.1 ora #$AA
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*--------------------------------------
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D2.PutBytePtr2 sta (ZPPtr2)
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inc ZPPtr2
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bne .8
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inc ZPPtr2+1
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.8 rts
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*--------------------------------------
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D2.WriteTrackPtr2
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lda D2.hTrkBuf
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>SYSCALL2 GetMemPtr
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>STYA ZPPtr1
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php
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sei
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ldy #D2.TrkWriter.Size
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.1 lda D2.TrkWriter-1,y
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sta $1ff,y
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dey
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bne .1
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ldx D2.Slotn0
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jsr $200
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bcs .9
|
||
|
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plp
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clc
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rts
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.9 plp
|
||
sec
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rts
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*--------------------------------------
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MAN
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SAVE usr/src/lib/libblkdev.s.d2
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LOAD usr/src/lib/libblkdev.s
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ASM
|