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A2osX/LIB/LIBBLKDEV.S.txt
Rémy GIBERT 8f59dca003 Kernel 0.9.2
2018-10-02 17:52:30 +02:00

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NEW
PREFIX /A2OSX.BUILD
AUTO 4,1
.LIST OFF
.OP 65C02
.OR $2000
.TF LIB/LIBBLKDEV.O
*--------------------------------------
.INB INC/MACROS.I
.INB INC/A2OSX.I
.INB INC/MLI.I
.INB 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
* ## C
* int getprodoscatsize (short int options, short int catsize, int devsize );
* ## ASM
* **In:**
* PUSHW = DevSize (in 512b blocks)
* PUSHB = Catalog Size (in blocks)
* PUSHB = Options
* **Out:**
* X=BlockCount (max 22)
* Y,A=BufSize (max $4400)
*\--------------------------------------
GetProDOSCatSize
>PULLB VolDirHdr.Options
>PULLB VolDirHdr.CatSize
>PULLW VolDirHdr.TB
GetProDOSCatSize.I
lda VolDirHdr.TB Get DevSizeLo
clc for now, no partial bitmap blk to add
tay DevSize is xxxxxxxx00000000 ?
beq .1
sec
.1 lda VolDirHdr.TB+1 Get DevSizeHI
bit #$0f DevSize is xxxx000000000000 ?
beq .2
sec
.2 php
lsr
lsr
lsr
lsr
plp
inc +1 (ProDOS)
inc +1 (SOS)
adc VolDirHdr.CatSize +x (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)
* PUSHB = Catalog Size (in blocks)
* PUSHB = Options
* PUSHW = VolName (PSTR)
* PUSHW = DstBuf (Zero filled)
* Blk0 : ProDOS.BootBlk
* Blk1 : SOS.BootBlk
* Blk2...n : Volume Directory
* Blkn+1.. : 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
>PULLB VolDirHdr.Options
>PULLB VolDirHdr.CatSize
inc
inc
sta VolDirHdr.BMPtr
>PULLW VolDirHdr.TB
ldx #3
.1 lda DATELO,x
sta VolDirHdr.CT,x
dex
bpl .1
* Blk 0 : ProDOS 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
* Blk 1 : (SOS boot code)
inc ZPPtr1+1
inc ZPPtr1+1
* Blk 2 : First Directory Block
* ldy #0
stz VolDirHdr.Prev
* stz VolDirHdr.Prev+1 always 0
lda #3 next block
ldx VolDirHdr.CatSize
dex
bne .30
txa
.30 sta VolDirHdr.next
* stz VolDirHdr.next+1
.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
* Blk 3...n : additional Directory Blocks
lda #3 Actual Block ID
ldy #2 next blk ptr
.41 inc ZPPtr1+1
inc ZPPtr1+1 Next Block
dex
bmi .40
dec Previous Blk ID
sta (ZPPtr1)
inc
inc next blk id
phx
plx
bne .42
txa
.42 sta (ZPPtr1),y
bra .41
* BitMap Blocks : 0=Used 1=free
.40 jsr GetProDOSCatSize.I 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
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
*--------------------------------------
* 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
*--------------------------------------
* Block 2 : First DIR block
*--------------------------------------
VolDirHdr
VolDirHdr.Prev .BS 2 pointer to previous block
VolDirHdr.Next .BS 2 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)
VolDirHdr.BMPtr .BS 2 bitmap pointer (Block 2..n are Volume directory)
VolDirHdr.TB .BS 2 Total Blocks
VolDirHdr.size .EQ *-VolDirHdr
*--------------------------------------
VolDirHdr.Options .BS 1
VolDirHdr.CatSize .BS 1
*--------------------------------------
DiskII.OFS .HS 010305FF
DiskII.SIG .HS 20000300
DrvSlt .BS 1
TrkNum .BS 1
*--------------------------------------
Status .BS 1
DrvSltInUse .BS 1
Count .BS 2
*--------------------------------------
MAN
SAVE /A2OSX.SRC/LIB/LIBBLKDEV.S
ASM
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