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Kernel version 0.8 : KM.VSDRIVE, work in progress

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This commit is contained in:
Rémy GIBERT 2016-12-16 14:38:57 +01:00
parent 63e97cd7d5
commit a90fd1ffa9
1 changed files with 44 additions and 37 deletions
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81
SYS/KM.VSDRIVE.S.txt
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@ -217,7 +217,7 @@ ProDOS.PATCH .PH DRV.EntryPoint
* OP = 3 : Read drv1
* OP = 4 : Write drv2
* OP = 5 : Read drv2
* CMD = $CE+OP+BLKLO+BLKHI+CHKSUM
* CMD = $C5+OP+BLKLO+BLKHI+CHKSUM
* DO NOT trash DRV.COMMAND...DRV.BLKNUM as ProDOS
* reuses them after Block operation
* A1,A2 are used by Disk II Driver,
@ -236,14 +236,13 @@ DRV .EQ *
.PH $D001 Main LC Bnk 2 $D001->$DFFF
cld
DRV.Slotn0 ldx #$ff Self Modified
lda DRV.COMMAND
lda DRV.COMMAND S=0,R=1,W=2,F=3
beq .8 Status
cmp #3
beq .81 Format ....
bcs .9 more....IO error
eor #$ff exchange W=1,R=2
inc W=2,R=3
ora #2 W=2,R=3
ldx DRV.UNITNUM
bpl .1
adc #2 CC from bcs .9
@ -264,49 +263,46 @@ DRV.DO.CMD sta DRV.CmdBuf.Cmd store cmd
eor #VS.CMD
eor DRV.BLKNUM
eor DRV.BLKNUM+1
sta DRV.CmdBuf.Sum Compute & store CheckSum
ldy DRV.BLKNUM
sty DRV.CmdBuf.Blk
lda DRV.BLKNUM
sta DRV.CmdBuf.BlkLo
ldy DRV.BLKNUM+1
sty DRV.CmdBuf.Blk+1
sta DRV.CmdBuf.Sum
lda DRV.BLKNUM+1
sta DRV.CmdBuf.BlkHi
lda DRV.BUFF
sta DRV.A2L
sta DRV.A1L
lda DRV.BUFF+1
inc
sta DRV.A2H
sta DRV.A1H
* send CMD+CS
ldy #0
ldy #4 Send 5 bytes including Sum
.1 lda DRV.CmdBuf,y
.1 lda DRV.CmdBuf.Sum,y
jsr DRV.SSCSend
bcs .9
iny
cpy #5
bne .1
dey
bpl .1
* read back CMD
ldy #0
ldy #3 Read Back and check 4 bytes
.2 jsr DRV.SSCGet
bcs .9
cmp DRV.CmdBuf,y
cmp DRV.CmdBuf.BlkHi,y
bne .9
iny
cpy #4
bne .2
dey
bpl .2
* Get ProDOS Date/time send from server if READ (3 or 5)
lda DRV.COMMAND
cmp #1
bne .6
dec 1-1=0 if read
bne .6 go write
* Read block : Discard ProDOS time recieved from Server (4 bytes)
* Read block
ldy #4 Read 4 bytes
.3 jsr DRV.SSCGet
@ -317,14 +313,14 @@ DRV.DO.CMD sta DRV.CmdBuf.Cmd store cmd
dey
bne .3
* recieve Header CS and check
* recieve Header Sum and check
jsr DRV.SSCGet
bcs .9
cmp DRV.CmdBuf.Sum
eor DRV.CmdBuf.Sum
bne .9
ldy #0
* tay Y=0 from dey/bne
.4 jsr DRV.SSCGet
bcs .9
@ -334,7 +330,7 @@ DRV.DO.CMD sta DRV.CmdBuf.Cmd store cmd
.5 jsr DRV.SSCGet
bcs .9
sta (DRV.A2L),y
sta (DRV.A1L),y
iny
bne .5
@ -343,10 +339,9 @@ DRV.DO.CMD sta DRV.CmdBuf.Cmd store cmd
jsr DRV.SSCGet
bcs .9
cmp DRV.CmdBuf.Sum
eor DRV.CmdBuf.Sum
bne .9
clc
rts
rts A=0,CC from bcs .9
* Write Block
.6 ldy #0
@ -357,26 +352,38 @@ DRV.DO.CMD sta DRV.CmdBuf.Cmd store cmd
iny
bne .7
.8 lda (DRV.A2L),y
.8 lda (DRV.A1L),y
jsr DRV.SSCSend
bcs .9
iny
bne .8
jsr DRV.BufCheckSum
sta DRV.CmdBuf.Sum Save Block CheckSum for comparing later
jsr DRV.SSCSend
bcs .9
ldy #4 Read 5 bytes (echo from server)
.81 jsr DRV.SSCGet
bcs .9
eor DRV.CmdBuf.Sum,y Check 5 bytes (including block Sum)
bne .9
dey
bpl .81
rts
.9
DRV.CS sec
rts
*--------------------------------------
DRV.CmdBuf .DA #VS.CMD
DRV.CmdBuf.Sum .BS 1 Reverse order for dey
DRV.CmdBuf.BlkHi .BS 1
DRV.CmdBuf.BlkLo .BS 1
DRV.CmdBuf.Cmd .BS 1
DRV.CmdBuf.Blk .BS 2
DRV.CmdBuf.Sum .BS 1
DRV.CmdBuf.Env .DA #VS.CMD
*--------------------------------------
DRV.BufCheckSum lda #0
tay