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A2osX/LIB/LIBBLKDEV.S.txt

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PR#3
PREFIX /A2OSX.BUILD
NEW
INC 1
AUTO 6
.LIST OFF
.OP 65C02
.OR $2000
.TF /A2OSX.BUILD/LIB/LIBBLKDEV.O
*--------------------------------------
.INB /A2OSX.BUILD/INC/MACROS.I
.INB /A2OSX.BUILD/INC/A2OSX.I
.INB /A2OSX.BUILD/INC/PRODOS.I
.INB /A2OSX.BUILD/INC/LIBBLKDEV.I
*--------------------------------------
* NIBBLE track len = $1A00 (6656) bytes:
*
*--------------------------------------
GAP1 .EQ 48
GAP2 .EQ 6
GAP3 .EQ 27
*--------------------------------------
Status.PrvDrvOff .EQ $80 Waiting old drive stop spining
Status.DrvOn .EQ $81 Waiting target drive spin
Status.seek .EQ $82 target drive seeking
*--------------------------------------
D2Ph0Off .EQ $C080
D2Ph0On .EQ $C081
D2Ph1Off .EQ $C082
D2Ph1On .EQ $C083
D2Ph2Off .EQ $C084
D2Ph2On .EQ $C085
D2Ph3Off .EQ $C086
D2Ph3On .EQ $C087
D2DrvOff .EQ $C088
D2DrvOn .EQ $C089
D2DrvSel1 .EQ $C08A
D2DrvSel2 .EQ $C08B
D2WShift .EQ $C08C W
D2WLoad .EQ $C08D W
D2RData .EQ $C08C R
D2ReadProt .EQ $C08D R
D2ReadMode .EQ $C08E R
D2WriteMode .EQ $C08F W
*--------------------------------------
ZPPtr1 .EQ ZPLIB
ZPPtr2 .EQ ZPLIB+2
ZPPtr3 .EQ ZPLIB+4
*--------------------------------------
* File Header (16 Bytes)
*--------------------------------------
CS.START cld
jmp (.1,x)
.DA #$61 6502,Level 1 (65c02)
.DA #1 BIN Layout Version 1
.DA 0
.DA CS.END-CS.START
.DA 0
.DA 0
.DA 0
*--------------------------------------
* Relocation Table
*--------------------------------------
.1 .DA LIB.LOAD
.DA LIB.UNLOAD
.DA GetProDOSCatSize
.DA BuildProDOSCat
.DA D2TrkR16s
.DA D2TrkRNIB
.DA D2TrkW16s
.DA D2TrkWNIB
L.TrkWriter .DA TrkWriter
L.ProDOS.Boot .DA ProDOS.Boot
.DA 0
*--------------------------------------
LIB.LOAD
LIB.UNLOAD clc
rts
*/--------------------------------------
* # GetProDOSCatSize
* Compute space needed for ProDOS Catalog
* ## In :
* PUSHW = DevSize (in 512b blocks)
* ## Out :
* X=BlockCount (max 22)
* Y,A=BufSize (max $4400)
*\--------------------------------------
GetProDOSCatSize
>PULLA
pha
>PULLA
tax
pla A=DevSizeLo
GetProDOSCatSizeAX
clc for now, no partial bitmap blk to add
tay DevSize is xxxxxxxx00000000 ?
beq .1
sec
.1 txa Get DevSizeHI
bit #$0f DevSize is xxxx000000000000 ?
beq .2
sec
.2 php
lsr
lsr
lsr
lsr
plp
adc #6 at least, 1(ProDOS)+1(SOS)+4(VolDir)
tax X = Total blocks needed for header (used)
asl A = Total pages needed to build catalog.
rts
*/--------------------------------------
* # BuildProDOSCat
* ## In :
* PUSHW = DevSize (in 512b blocks)
* PUSHW = VolName (PSTR)
* PUSHW = DstBuf (Zero filled)
* Blk0 : ProDOS.BootBlk
* Blk1 : SOS.BootBlk
* Blk2,3,4,5 : Volume Directory
* Blk6.... : Volume Bitmap (4096/Blk)
* max devSize = 65535 -> max 16 Bitmap Blk
* absolute MAX DstBuf size=
* 7 for Disk II(280blk),3.5(1600),3.5HD(2880)
* 22 for 32mb Hardisk...
*\--------------------------------------
BuildProDOSCat >PULLW ZPPtr1 DstBuf
>PULLW ZPPtr2 VolName
>PULLW VolDirHdr.TB
ldx #3
.1 lda DATELO,x
sta VolDirHdr.CT,x
dex
bpl .1
* Boot Code
>LDYA L.ProDOS.Boot
>STYA ZPPtr3
ldy #0
ldx #2 2 pages
.2 lda (ZPPtr3),y
sta (ZPPtr1),y
iny
bne .2
inc ZPPtr3+1
inc ZPPtr1+1
dex
bne .2
inc ZPPtr1+1 Skip Blk 2 (SOS boot code)
inc ZPPtr1+1
* Directory Blocks
* ldy #0
.3 lda (ZPPtr2),y
beq .31
iny
sta VolDirHdr.Name,y
cpy #15
bne .3
.31 tya
* and #$0f make sure 15 bytes max
ora #$F0 Volume Directory Header
sta VolDirHdr.Name
ldy #VolDirHdr.size-1
.4 lda VolDirHdr,y
sta (ZPPtr1),y
dey
bpl .4
inc ZPPtr1+1
inc ZPPtr1+1 Blk 3
ldy #2
lda #2
sta (ZPPtr1)
lda #4
sta (ZPPtr1),y
inc ZPPtr1+1
inc ZPPtr1+1 Blk 4
lda #3
sta (ZPPtr1)
lda #5
sta (ZPPtr1),y
inc ZPPtr1+1
inc ZPPtr1+1 Blk 5
lda #4
sta (ZPPtr1)
inc ZPPtr1+1
inc ZPPtr1+1 Blk 6
* BitMap Blocks : 0=Used 1=free
lda VolDirHdr.TB
ldx VolDirHdr.TB+1
jsr GetProDOSCatSizeAX X=blk used for boot/dir/bitmap
lda VolDirHdr.TB
eor #$ff
sta Count
lda VolDirHdr.TB+1
eor #$ff
sta Count+1
ldy #0
.50 lda #%10000000
.5 dex
bmi .8
inc Count
bne .6
inc Count+1
.6 lsr
bne .5
iny
bne .50
.7 lda #%10000000
.8 inc Count
bne .81
inc Count+1
beq .88
.81 pha
eor (ZPPtr1),y
sta (ZPPtr1),y
pla
lsr
bne .8
iny
bne .7
inc ZPPtr1+1
bra .7
.88 clc
rts
*/--------------------------------------
*\--------------------------------------
D2TrkRNIB
*/--------------------------------------
*\--------------------------------------
D2TrkR16s
*/--------------------------------------
* # TrkW16s
* Write a track (16 sectors)
* ## In:
* PUSHW = Ptr to 16*256 buffer
* PUSHB = TrackNum * 4 : 0->140+
* PUSHB = DSSS0000
* ## Out:
* CC : success
* CS : A = Error
* A=0, currently starting/seeking...
*\--------------------------------------
D2TrkW16s
clc
rts
*/--------------------------------------
* # TrkWNIB
* Write a track (NIBBLE)
* ## In:
* PUSHW = Ptr to NIBBLE buffer (0 ended)
* PUSHB = TrackNum * 4 : 0->140+
* PUSHB = DSSS0000
* ## Out:
* CC : success
* CS : A = Error
* A=0, currently starting/seeking...
*\--------------------------------------
D2TrkWNIB >PULLB DrvSlt
>PULLB TrkNum
>PULLW ZPPtr1
lda Status Lib is busy....?
beq .10
lda DrvSlt
cmp DrvSltInUse resume previous access ?
.10 lda DEVNUM last drive accessed by ProDOS
and #$F0 only DSSS
pha
jsr CheckDiskII was it a DISK II ?
bcs .1 no, no need to check if spinning
pla
pha
jsr DrvSpinCheck
bcc .1 not spinning....continue
pla
sta D2DrvOff,x
lda #Status.PrvDrvOff
jmp SetStatusAndExit
.1 pla
cmp DrvSlt
* beq
lda DrvSlt
jsr DrvTrkSelect
bcs .9
ldy #TrkWriter.Size
*.7 lda TrkWriter,y
* sta UsrBuf256,y
* dey
* bne .7
* jmp UsrBuf256
clc
.9 rts
*--------------------------------------
SetStatusAndExit
sta Status
ldy DrvSlt
sty DrvSltInUse
clc
rts
*--------------------------------------
* A=DSSS0000
* Y=target Track Number * 4
*--------------------------------------
DrvTrkSelect jsr DrvSelect
clc
rts
*--------------------------------------
* A=DSSS0000
*--------------------------------------
CheckDiskII and #$70 only 0SSS
lsr
lsr
lsr
ora #$C0 make Cn
sta .2+2
ldx #3 4 bytes to check
.1 ldy DiskII.OFS,x
.2 lda $C000,y Self Modified
cmp DiskII.SIG,x
bne .9
dex
bpl .1
clc all bytes match, Disk II
rts
.9 sec
rts
*--------------------------------------
* A=DSSS0000
*--------------------------------------
DrvSpinCheck jsr DrvSelect
ldy #0
lda D2RData,x
.1 cmp D2RData,x
bne .8 spinning
dey
bne .1
clc CC:not spinning
rts
.8 sec
rts
*--------------------------------------
* A=DSSS0000
*--------------------------------------
DrvSelect pha
and #$70
tax
pla
asl
adc #D2DrvSel1
sta .1+1
.1 lda D2DrvSel1,x Drv 1/2 select
lda D2ReadMode,x Make sure readmode
rts
*--------------------------------------
CS.END
DiskII.OFS .HS 010305FF
DiskII.SIG .HS 20000300
DrvSlt .BS 1
TrkNum .BS 1
*--------------------------------------
Status .BS 1
DrvSltInUse .BS 1
Count .BS 2
*--------------------------------------
* TrkWriter
* X = Slot Cn
* ZPPtr1 = Ptr To NibbleBuf
*--------------------------------------
TrkWriter .PH $200
TrkWriter.Start lda D2ReadMode,x
lda D2ReadProt,x
bmi .9 Write protected
php
sei
ldy #0
.1 lda (ZPPtr1),y (5) as NibbleBuf is page alligned, no page crossing
beq .8 (2)(3 if Z) END OF TRACK
* nobody will never try to write 00000000, right?
cmp #$80 (2) if CC, it is a sync byte
ora #$80 (2) make sure Bit7 high
sta D2WriteMode,x (5)
ora D2WShift,x (4) keep C unmodified
iny (2)
bne .2 (2)(3 if nz)
inc ZPPtr1+1 (5)
bcs .1 (2)(3 if cs) regular 32us byte
* 32us Byte,next page : 5+2 (beq failed) +2+2+5+4+2+2 (bne failed) + 5 + 3 (bcs succeeded) = 32
nop (2) Sync 40us byte : add 8 cycles
nop (2)
nop (2)
bra .1 (3)
* 40us Byte,next page : 5+2 (beq failed) +2+2+5+4+2+2 (bne failed) + 5 + 2 (bcs failed) +2+2+2+3 = 40
.2 nop (2)
nop (2)
bcs .1 (2)(3 if cs) regular 32us byte
* 32us Byte,same page : 5+2 (beq failed) +2+2+5+4+2+3 (bne succeeded) + 2 +2 + 3 (bcs succeeded) = 32
nop (2) Sync 40us byte : add 8 cycles
nop (2)
nop (2)
bra .1 (3)
* 40us Byte,same page : 5+2 (beq failed) +2+2+5+4+2+2 (bne failed) + 5 + 2 (bcs failed) +2+2+2+3 = 40
.8 pha (3) make sure 32us elapsed before switching to read mode (beq(3)+pha(3)=beq(2)+cmp(2)+ora(2))
lda D2ReadMode,x close write mode
lda D2RData,x
pla from pha (3)
plp
clc
rts
.9 lda #$2B Write Protected
sec
rts
TrkWriter.Size .EQ *-TrkWriter.Start
.EP
*--------------------------------------
ProDOS.Boot .HS 01.38.b0.03.4c.32.a1.86.43.c9.03.08.8a.29.70.4a
.HS 4a.4a.4a.09.c0.85.49.a0.ff.84.48.28.c8.b1.48.d0
.HS 3a.b0.0e.a9.03.8d.00.08.e6.3d.a5.49.48.a9.5b.48
.HS 60.85.40.85.48.a0.63.b1.48.99.94.09.c8.c0.eb.d0
.HS f6.a2.06.bc.1d.09.bd.24.09.99.f2.09.bd.2b.09.9d
.HS 7f.0a.ca.10.ee.a9.09.85.49.a9.86.a0.00.c9.f9.b0
.HS 2f.85.48.84.60.84.4a.84.4c.84.4e.84.47.c8.84.42
.HS c8.84.46.a9.0c.85.61.85.4b.20.12.09.b0.68.e6.61
.HS e6.61.e6.46.a5.46.c9.06.90.ef.ad.00.0c.0d.01.0c
.HS d0.6d.a9.04.d0.02.a5.4a.18.6d.23.0c.a8.90.0d.e6
.HS 4b.a5.4b.4a.b0.06.c9.0a.f0.55.a0.04.84.4a.ad.02
.HS 09.29.0f.a8.b1.4a.d9.02.09.d0.db.88.10.f6.29.f0
.HS c9.20.d0.3b.a0.10.b1.4a.c9.ff.d0.33.c8.b1.4a.85
.HS 46.c8.b1.4a.85.47.a9.00.85.4a.a0.1e.84.4b.84.61
.HS c8.84.4d.20.12.09.b0.17.e6.61.e6.61.a4.4e.e6.4e
.HS b1.4a.85.46.b1.4c.85.47.11.4a.d0.e7.4c.00.20.4c
.HS 3f.09.26.50.52.4f.44.4f.53.20.20.20.20.20.20.20
.HS 20.20.a5.60.85.44.a5.61.85.45.6c.48.00.08.1e.24
.HS 3f.45.47.76.f4.d7.d1.b6.4b.b4.ac.a6.2b.18.60.4c
.HS bc.09.a9.9f.48.a9.ff.48.a9.01.a2.00.4c.79.f4.20
.HS 58.fc.a0.1c.b9.50.09.99.ae.05.88.10.f7.4c.4d.09
.HS aa.aa.aa.a0.d5.ce.c1.c2.cc.c5.a0.d4.cf.a0.cc.cf
.HS c1.c4.a0.d0.d2.cf.c4.cf.d3.a0.aa.aa.aa.a5.53.29
.HS 03.2a.05.2b.aa.bd.80.c0.a9.2c.a2.11.ca.d0.fd.e9
.HS 01.d0.f7.a6.2b.60.a5.46.29.07.c9.04.29.03.08.0a
.HS 28.2a.85.3d.a5.47.4a.a5.46.6a.4a.4a.85.41.0a.85
.HS 51.a5.45.85.27.a6.2b.bd.89.c0.20.bc.09.e6.27.e6
.HS 3d.e6.3d.b0.03.20.bc.09.bc.88.c0.60.a5.40.0a.85
.HS 53.a9.00.85.54.a5.53.85.50.38.e5.51.f0.14.b0.04
.HS e6.53.90.02.c6.53.38.20.6d.09.a5.50.18.20.6f.09
.HS d0.e3.a0.7f.84.52.08.28.38.c6.52.f0.ce.18.08.88
.HS f0.f5.bd.8c.c0.10.fb.00.00.00.00.00.00.00.00.00
*--------------------------------------
VolDirHdr .DA 0 pointer to previous block
.DA 3 pointer to next block
VolDirHdr.Name .BS 16
.HS 00.00.00.00.00.00.00.00
VolDirHdr.CT .BS 4 Creation time
.HS 01.00.C3.27.0D version/min version/access/EL/EPB
.DA 0 File Count=0 (only VDH)
.DA 6 bitmap pointer (Block 2..5 are Volume directory)
VolDirHdr.TB .BS 2 Total Blocks
VolDirHdr.size .EQ *-VolDirHdr
*--------------------------------------
MAN
SAVE /A2OSX.SRC/LIB/LIBBLKDEV.S
ASM
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