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A2osX/LIB/LIBBLKDEV.S.txt
burniouf 019d1e3c0e Floppy format stuff
2022-05-25 20:46:02 +02:00

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NEW
AUTO 3,1
.LIST OFF
.OP 65C02
.OR $2000
.TF lib/libblkdev
*--------------------------------------
.INB inc/macros.i
.INB inc/a2osx.i
.INB inc/mli.i
.INB inc/mli.e.i
.INB inc/io.d2.i
*--------------------------------------
* 300rpm = 5rps = 200000us / 4us = 50000 bits MAX
*--------------------------------------
TRACK16.LEN .EQ 6240
*--------------------------------------
TRACK16.GAP1 .EQ 80 800 bits
* 16 * (
*Address field = D5AA96 + 4x2 + DEAAEB = 14 112 bits
TRACK16.GAP2 .EQ 6 60 bits
*Data field = D5AAAD + 342 + CS + DEAAEB = 349 2792 bits
TRACK16.GAP3 .EQ 16 160 bits
* )
* 80 + 16 * (6 + 14 + 349 + 16) = 6240 800 + 49984 bits
*--------------------------------------
TRACK9.LEN .EQ 6511
*--------------------------------------
TRACK9.GAP1 .EQ 8+14 220 bits
* 9 * (
*Address field = D5AA96 + 4x2 + DEAAEB = 14 112 bits
TRACK9.GAP2 .EQ 5 50 bits
*Data field = D5AAAD + 342 + 342 + CS = 688 5504 bits
TRACK9.GAP3 .EQ 14 140 bits
* )
* 9 * (14 + 5 + 688) = 6363 50904 bits (1480 free = 148 sync bytes)
* 22 + 9 * (14 + 5 + 688 + 14) = 6511 52384 bits (6548)
*--------------------------------------
ZPPtr1 .EQ ZPLIB
ZPPtr2 .EQ ZPLIB+2
ZPPtr3 .EQ ZPLIB+4
ZPPtr4 .EQ ZPLIB+6
X.TRkFMT.Z .EQ ZPLIB+8
*--------------------------------------
* 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 D2.MotorControl
.DA D2.Recalibrate
.DA D2.MoveHead
.DA D2.HeadSelect
.DA D2.TrkFmt16s
.DA D2.TrkRead16s
.DA D2.TrkWrite16s
.DA D2.TrkReadNIB
.DA D2.TrkWriteNIB
L.X.BB.PRODOS .DA X.BB.PRODOS
L.X.BB.SOS .DA X.BB.SOS
L.X.BB.FXpart1 .DA X.BB.FX2
L.X.BB.FXpart2 .DA X.BB.FX2+512
.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
* ## RETURN VALUE
* 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
.10 lda DATELO,x
sta VolDirHdr.CT,x
dex
bpl .10
bit VolDirHdr.Options
bmi .11
* Blk 0 : ProDOS Boot Code
>LDYA L.X.BB.PRODOS
jsr Add2Pages
* Blk 1 : (SOS boot code)
>LDYA L.X.BB.SOS
jsr Add2Pages
bra .20
.11 >LDYA L.X.BB.FXpart1
jsr Add2Pages
>LDYA L.X.BB.FXpart2
jsr Add2Pages
* Blk 2 : First Directory Block
.20 jsr ZeroPtr1
* 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
* stz VolDirHdr.VER
* stz VolDirHdr.MVER
.3 lda (ZPPtr2),y
beq .39
iny
cmp #'a'
bcc .38
cmp #'z'+1
bcs .38
eor #$20
pha
cpy #8
bcs .31
lda LC.BitMap,y
tsb VolDirHdr.MVER
bra .32
.31 lda LC.BitMap-8,y
tsb VolDirHdr.VER
.32 lda #$80
tsb VolDirHdr.MVER
pla
.38 sta VolDirHdr.Name,y
cpy #15
bne .3
.39 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
jsr ZeroPtr1
inc ZPPtr1+1 Next Block
jsr ZeroPtr1
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
BuildProDOSCat.BM
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
bne .81
clc
rts
.81 pha
eor (ZPPtr1),y
sta (ZPPtr1),y
pla
lsr
bne .8
iny
bne .7
inc ZPPtr1+1
jsr ZeroPtr1
bra .7
*--------------------------------------
ZeroPtr1 phy
pha
lda #0
tay
.1 sta (ZPPtr1),y
iny
bne .1
pla
ply
rts
*--------------------------------------
Add2Pages >STYA ZPPtr3
ldy #0
ldx #2 2 pages
.1 lda (ZPPtr3),y
sta (ZPPtr1),y
iny
bne .1
inc ZPPtr3+1
inc ZPPtr1+1
dex
bne .1
rts
*--------------------------------------
.INB usr/src/lib/libblkdev.s.d2
*--------------------------------------
CS.END
*--------------------------------------
* TrkFormat
* X = Slot Cn
*--------------------------------------
D2.TrkFormat .PH $200
D2.TrkFormat.Start
.INB usr/src/shared/x.trkfmt.s
D2.TrkFormat.Size .EQ *-D2.TrkFormat.Start
.EP
*--------------------------------------
* TrkWriter
* X = Slot Cn
* ZPPtr1 = Ptr To NibbleBuf
*--------------------------------------
D2.TrkWriter .PH $200
D2.TrkWriter.Start
lda IO.D2.ReadProt,x
lda IO.D2.ReadMode,x
bmi .9 Write protected
ldy ZPPtr1
stz ZPPtr1
lda (ZPPtr1),y
iny
* bne .10 no chance this happens because mem blocks are $FFF0 aligned....
* inc ZPPtr1+1
*.10
cmp #$80 if CC, it is a sync byte
ora #$80 make sure Bit7 high
sta IO.D2.WriteMode,x (5) goto write mode
ora IO.D2.WShift,x (4)
nop (2)
bra .2 (3)
.1 lda (ZPPtr1),y (5) as NibbleBuf is page aligned, 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 #$80 (2) make sure Bit7 high
sta IO.D2.WLoad,x (5)
ora IO.D2.WShift,x (4) keep C unmodified
iny (2)
bne .2 (2)(3 if nz)
* 32us Byte,next page : 2 (beq failed)+5 +2+2+5+4+2+2 (bne failed) + 5 + 3 (bcs succeeded) = 32
inc ZPPtr1+1 (5)
bcs .1 (2)(3 if cs) regular 32us byte
* 40us Byte,next page : 2 (beq failed) +2+2+5+4+2+2 (bne failed) + 5 + 2 (bcs failed) +2+2+2+3 = 40
nop (2) Sync 40us byte : add 8 cycles
nop (2)
nop (2)
bra .1 (3)
* 32us Byte,same page : 5+2 (beq failed) +2+2+5+4+2+3 (bne succeeded) + 2 +2 + 3 (bcs succeeded) = 32
.2 nop (2)
nop (2)
bcs .1 (2)(3 if cs) regular 32us byte
* 40us Byte,same page : 5+2 (beq failed) +2+2+5+4+2+2 (bne failed) + 5 + 2 (bcs failed) +2+2+2+3 = 40
nop (2) Sync 40us byte : add 8 cycles
nop (2)
nop (2)
bra .1 (3)
.8 pha (3) make sure 32us elapsed before switching to read mode (beq(3)+pha(3)=beq(2)+cmp(2)+ora(2))
lda IO.D2.ReadMode,x close write mode
lda IO.D2.RData,x
pla from pha (3)
clc
rts
.9 lda #MLI.E.WRTPROT
sec
rts
D2.TrkWriter.Size .EQ *-D2.TrkWriter.Start
.EP
*--------------------------------------
ADDR.Head .HS 96AAD5
DATA.Head .HS ADAAD5
TAIL .HS EBAADE
*--------------------------------------
Nib2FC .HS 0004
.HS FFFF
.HS 080C
.HS FF
.HS 101418
D2.XX000000 .HS 008040C0FFFF used in fast prenib as lookup for 2-bit quantities.
.HS 1C20
.HS FFFFFF
.HS 24282C3034
.HS FFFF
.HS 383C4044484C
.HS FF
.HS 5054585C606468
D2.00XX0000 .HS 00201030 used in fast prenib.
endmrks .HS DEAAEB table using 'unused' nibbles ($C4,$C5,$C6,$C7)
.HS FFFFFFFF
.HS 6C
.HS FF
.HS 707478
.HS FFFFFF
.HS 7C
.HS FFFF
.HS 8084
.HS FF
.HS 888C9094989CA0
D2.0000XX00 .HS 0008040C used in fast prenib.
.HS FF
.HS A4A8AC
.HS FF
.HS B0B4B8BCC0C4C8
.HS FFFF
.HS CCD0D4D8DCE0
.HS FF
.HS E4E8ECF0F4F8FC
*--------------------------------------
dnibl2 .HS 00
dnibl3 .HS 00
dnibl4 .HS 00
FC2Nib .HS 96
.HS 02000097
.HS 0100009A
.HS 0300009B
.HS 0002009D
.HS 0202009E
.HS 0102009F
.HS 030200A6
.HS 000100A7
.HS 020100AB
.HS 010100AC
.HS 030100AD
.HS 000300AE
.HS 020300AF
.HS 010300B2
.HS 030300B3
.HS 000002B4
.HS 020002B5
.HS 010002B6
.HS 030002B7
.HS 000202B9
.HS 020202BA
.HS 010202BB
.HS 030202BC
.HS 000102BD
.HS 020102BE
.HS 010102BF
.HS 030102CB
.HS 000302CD
.HS 020302CE
.HS 010302CF
.HS 030302D3
.HS 000001D6
.HS 020001D7
.HS 010001D9
.HS 030001DA
.HS 000201DB
.HS 020201DC
.HS 010201DD
.HS 030201DE
.HS 000101DF
.HS 020101E5
.HS 010101E6
.HS 030101E7
.HS 000301E9
.HS 020301EA
.HS 010301EB
.HS 030301EC
.HS 000003ED
.HS 020003EE
.HS 010003EF
.HS 030003F2
.HS 000203F3
.HS 020203F4
.HS 010203F5
.HS 030203F6
.HS 000103F7
.HS 020103F9
.HS 010103FA
.HS 030103FB
.HS 000303FC
.HS 020303FD
.HS 010303FE
.HS 030303FF
*--------------------------------------
LC.BitMap .HS 8040201008040201
*--------------------------------------
X.BB.PRODOS .INB usr/src/shared/x.bb.prodos.s
X.BB.SOS .INB usr/src/shared/x.bb.sos.s
X.BB.FX2 .INB usr/src/shared/x.bb.fx2.s
*--------------------------------------
* 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
VolDirHdr.VER .BS 1
VolDirHdr.MVER .BS 1
.HS C3.27.0D 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
*--------------------------------------
D2.hTrkBuf .BS 1
D2.DrvSlt .BS 1
D2.Slotn0 .BS 1
D2.MotorOn .BS 1
D2.CurrentQTrack .BS 1
D2.TargetQTrack .BS 1
D2.Checksum .BS 1
D2.SectNum .BS 1
D2.TrkNum .BS 1
D2.VolNum .BS 1
D2.HeadNum .BS 1
Count .BS 2
*--------------------------------------
MAN
SAVE usr/src/lib/libblkdev.s
ASM
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