A2osX/DRV/X.SSC.DRV.S.txt

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AUTO 3,1
.OP 65C02
.OR $2000
*--------------------------------------
.DO SSCIRQ=1
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.TF DRV/SSC.I.DRV
.ELSE
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.TF DRV/SSC.DRV
.FIN
*--------------------------------------
.DO SSCIRQ=1
BUF.SIZE .EQ $40
BUF.MASK .EQ $3F
.FIN
*--------------------------------------
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ZPArgPtr .EQ ZPBIN
ZPParityPtr .EQ ZPBIN+2
ZPControlPtr .EQ ZPBIN+4
ZPhParity .EQ ZPBIN+6
ZPhControl .EQ ZPBIN+7
*--------------------------------------
* File Header (16 Bytes)
*--------------------------------------
CS.START cld
jmp Dev.Detect cld,jmp abs=DRV
.DA #$61 6502,Level 1 (65c02)
.DA #1 DRV Layout Version 1
.DA 0
.DA CS.END-CS.START Code Length
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.DA 0
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.DA #32 SS
.DA #8 ZP
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.DA 0
*--------------------------------------
* Relocation Table
*--------------------------------------
L.MSG.DETECT .DA MSG.DETECT
L.MSG.DETECT.OK .DA MSG.DETECT.OK
L.MSG.DETECT.KO .DA MSG.DETECT.KO
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L.DRV.CS.START .DA DRV.CS.START
L.FD.DEV .DA FD.DEV
L.FD.DEV.NAME .DA FD.DEV.NAME
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L.SSCANF.ARGS .DA SSCANF.ARGS
L.DCB.BAUD .DA DCB+S.DCB.COM.BAUD
L.DCB.DATA .DA DCB+S.DCB.COM.DATA
L.DCB.STOP .DA DCB+S.DCB.COM.STOP
.DA 0 End Of Reloc Table
*--------------------------------------
Dev.Detect >STYA ARGS
>LDYA L.MSG.DETECT
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>SYSCALL puts
stz ZPArgPtr
lda #$C1
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sta ZPArgPtr+1
.1 and #$0f
tay
lda A2osX.S,y
bne .3
ldx #DEVSIG.Length-1
.2 ldy DEVSIG.Offset,x
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lda (ZPArgPtr),y
cmp DEVSIG.Value,x
bne .3
dex
bpl .2
bra .4
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.3 inc FD.DEV.NAME+3
inc ZPArgPtr+1 no match, try next slot....
lda ZPArgPtr+1
cmp #$C8
bne .1
>LDYA L.MSG.DETECT.KO
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>SYSCALL puts
lda #MLI.E.NODEV Not Found in any slot, exiting
sec
rts
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.4 lda ZPArgPtr+1
and #$0F
pha
tay
lda #A2osX.S.COM
sta A2osX.S,y
pla
asl
asl
asl
asl
clc
adc #$8F
sta DEVSLOTn08F
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jsr Dev.ParseArgs
bcs .9
.8 >PUSHW L.FD.DEV.NAME
>PUSHBI 2
>LDYA L.MSG.DETECT.OK
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>SYSCALL printf
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>PUSHWI DRV.END
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>PUSHWI DRV.CS.END-DRV.CS.START
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>PUSHWI DRV.CS.START
>LDYA L.DRV.CS.START
>SYSCALL InsDrv
bcs .9
>STYA FD.DEV+S.FD.DEV.DRVPTR
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>PUSHW L.FD.DEV.NAME
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>LDYA L.FD.DEV
>SYSCALL MKDEV
.9 rts
*--------------------------------------
Dev.ParseArgs >LDYA ARGS
>STYA ZPArgPTR
lda (ZPArgPTR)
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bne .1
clc
rts
.1 stz ZPhParity
stz ZPhControl
>LDYAI 256
>SYSCALL getmem
bcs .2
>STYA ZPParityPtr
stx ZPhParity
>LDYAI 256
>SYSCALL getmem
.2 bcs .90
>STYA ZPControlPtr
stx ZPhControl
>PUSHW ZPControlPtr
>PUSHW ZPParityPtr
>PUSHW L.DCB.STOP
>PUSHW L.DCB.DATA
>PUSHW L.DCB.BAUD
>PUSHBI 10 5 x byte PTRs
>PUSHW L.SSCANF.ARGS
>LDYA ZPArgPtr
>SYSCALL sscanf
bcs .90
.90 lda ZPhControl
beq .91
>SYSCALL freemem
.91 lda ZPhParity
beq .92
>SYSCALL freemem
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.92 lda #E.SYN
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sec
rts
*--------------------------------------
CS.END
DEVSIG.Offset .HS 05070B0C
DEVSIG.Value .HS 38180131
DEVSIG.Length .EQ DEVSIG.Value-DEVSIG.Offset
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MSG.DETECT .AS "Apple SSC (Super Serial Card,//c Serial Port) Driver"
.DO SSCIRQ=1
.AS " (IRQ Enabled)"
.FIN
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.AZ "."
MSG.DETECT.OK .AZ "SSC Installed As Device : %s\r\n"
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MSG.DETECT.KO .AZ "No SSC Found."
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SSCANF.ARGS .AZ "%u,%d,%d,%s,%s"
ARGS .BS 2
*--------------------------------------
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FD.DEV .DA #S.FD.T.CDEV
.DA #0 HANDLER
.DA #0 BUSID
.DA #0 DEVID
.DA 0 BUSPTR
.BS 2 DRVPTR
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.DA 0 DCBPTR
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.DA 0 BUFPTR
FD.DEV.NAME .AZ "COM1"
*--------------------------------------
* Driver Code
*--------------------------------------
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ZPIOCTL .EQ ZPDRV
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ZPBufPtr .EQ ZPDRV+2
ZPCount .EQ ZPDRV+4
ZPCount2 .EQ ZPDRV+6
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*--------------------------------------
DRV.CS.START cld
jmp (.1,x)
.1 .DA STATUS
.DA A2osX.BADCALL
.DA A2osX.BADCALL
.DA A2osX.BADCALL
.DA CONTROL
.DA A2osX.BADCALL
.DA OPEN
.DA CLOSE
.DA READ
.DA WRITE
.DO SSCIRQ=1
.DA IRQ
.FIN
.DA 0 end or relocation
*--------------------------------------
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STATUS jsr STATUS.CONTROL.Init
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ldy #S.IOCTL.STATCODE
lda (ZPIOCTL),y
beq .1
cmp #S.IOCTL.STATCODE.GETDIB
bne STATUS.DCB
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ldy #S.DIB-1
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.HS 2C bit abs
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.1 ldy #3
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.2 lda DIB,y
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sta (ZPBufPtr),y
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dey
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bpl .2
clc
rts
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STATUS.DCB cmp #S.IOCTL.STATCODE.GETDCB
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bne .3
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ldy #S.DCB.COM-1
.2 lda DCB,y
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sta (ZPBufPtr),y
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dey
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bpl .2
clc
rts
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.3 cmp #S.IOCTL.STATCODE.EOF
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bne STATUS.9
lda DIB+S.DIB.S
and #S.DIB.S.OPENED
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beq OPEN.E
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.DO SSCIRQ=1
lda INBUF.TAIL
eor INBUF.HEAD
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beq .4 NO DATA? eof = TRUE
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lda #1
.4 dec
clc
rts
.ELSE
.FIN
.8 clc
rts
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STATUS.9 lda #MLI.E.BADCTL
sec
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rts
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*--------------------------------------
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CONTROL jsr STATUS.CONTROL.Init
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ldy #S.IOCTL.CTRLCODE
lda (ZPIOCTL),y
cmp #S.IOCTL.CTRLCODE.SETDCB
bne STATUS.9
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ldy #S.DCB.COM-1
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.2 lda (ZPBufPtr),y
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sta DCB,y
dey
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bpl .2
*--------------------------------------
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OPEN lda DIB+S.DIB.S
bit #S.DIB.S.OPENED
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beq OPEN.1
OPEN.E lda #MLI.E.OPEN
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sec
rts
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OPEN.1 php
sei
ldx DEVSLOTn08F
stz SSC.RESET-$8F,x
lda #SSC.CTL.CLKINT+SSC.CTL.B9600+SSC.CTL.8D+SSC.CTL.1S+SSC.CMD.NOP
sta SSC.CTL-$8F,x
.DO SSCIRQ=1
lda #SSC.CMD.TEIRQ+SSC.CMD.TE+SSC.CMD.DTR
sta SSC.CMD-$8F,x
stz INBUF.HEAD
stz INBUF.TAIL
stz OUTBUF.HEAD
stz OUTBUF.TAIL
.ELSE
lda #SSC.CMD.RIRQDIS+SSC.CMD.TE+SSC.CMD.DTR
sta SSC.CMD-$8F,x
.FIN
lda SSC.DATA-$8F,x discard any garbage byte
lda SSC.STATUS-$8F,x clear any IRQ pending
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lda #S.DIB.S.OPENED
tsb DIB+S.DIB.S
plp
clc
rts
*--------------------------------------
CLOSE php
sei
ldx DEVSLOTn08F
stz SSC.RESET-$8F,x
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lda #S.DIB.S.OPENED
trb DIB+S.DIB.S
plp
clc
rts
*--------------------------------------
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READ php
sei
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jsr READ.WRITE.Init
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stz ZPCount2
stz ZPCount2+1
.10 inc ZPCount
bne .11
inc ZPCount+1
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beq .8
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.11 .DO SSCIRQ=1
ldy INBUF.TAIL
cpy INBUF.HEAD
beq .2
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lda INBUF,y
iny
cpy #BUF.SIZE
bne .1
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ldy #0
.1 sty INBUF.TAIL
sta (ZPBufPtr)
inc ZPBufPtr
bne .12
inc ZPBufPtr+1
.12 inc ZPCount2
bne .10
inc ZPCount2+1
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bra .10
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.FIN
.2 lda SSC.STATUS-$8F,x
bit #SSC.STATUS.nDSR true when 0
bne .9
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bit #SSC.STATUS.RDRF incoming char?
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beq .8
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lda SSC.DATA-$8F,x
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sta (ZPBufPtr)
inc ZPBufPtr
bne .13
inc ZPBufPtr+1
.13 inc ZPCount2
bne .2
inc ZPCount2+1
bra .2
.8 lda ZPCount2
bne .81
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ora ZPCount2+1
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beq .99
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lda ZPCount2
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.81 ldy #S.IOCTL.BYTECNT
sta (ZPIOCTL),y
iny
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lda ZPCount2+1
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sta (ZPIOCTL),y
plp
clc
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rts
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.9 lda #MLI.E.IO
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.HS 2C BIT ABS
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.99 lda #E.NODATA
plp
sec
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rts
*--------------------------------------
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WRITE php
sei
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jsr READ.WRITE.Init
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.2 inc ZPCount
bne .3
inc ZPCount+1
beq .8
.3 .DO SSCIRQ=1
lda SSC.STATUS-$8F,x
bit #SSC.STATUS.nDSR true when 0
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bne .9
lda OUTBUF.HEAD
cmp OUTBUF.TAIL Buffer Empty?
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bne .6 not empty, queue char
lda SSC.STATUS-$8F,x
and #SSC.STATUS.TDRE Register Empty ?
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beq .5 not empty, queue char
lda (ZPBufPtr) yes, write directly to ACIA
inc ZPBufPtr
bne .4
inc ZPBufPtr+1
.4 sta SSC.DATA-$8F,x
bra .2
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.5 lda OUTBUF.HEAD
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.6 tay
inc
and #BUF.MASK
cmp OUTBUF.TAIL
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beq .99 Buffer Full!!
sta OUTBUF.HEAD
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lda (ZPBufPtr)
inc ZPBufPtr
bne .7
inc ZPBufPtr+1
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.7 sta OUTBUF,y
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bra .2
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.ELSE
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.4 lda SSC.STATUS-$8F,x
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bit #SSC.STATUS.nDSR true when 0
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bne .9
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bit #SSC.STATUS.TDRE Outgoing char?
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beq .4
lda (ZPBufPtr)
inc ZPBufPtr
bne .5
inc ZPBufPtr+1
.5 sta SSC.DATA-$8F,x
bra .2
.FIN
.8 plp
clc
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rts
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.9 lda #MLI.E.IO
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.HS 2C BIT ABS
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.99 lda #E.NODATA
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plp
sec
rts
*--------------------------------------
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READ.WRITE.Init ldx DEVSLOTn08F
STATUS.CONTROL.Init
>STYA ZPIOCTL
ldy #S.IOCTL.BUFPTR
lda (ZPIOCTL),y
sta ZPBufPtr
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iny
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lda (ZPIOCTL),y
sta ZPBufPtr+1
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iny #S.IOCTL.BYTECNT
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lda (ZPIOCTL),y
eor #$ff
sta ZPCount
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iny
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lda (ZPIOCTL),y
eor #$ff
sta ZPCount+1
rts
*--------------------------------------
* IRQ Handler
* on exit, CC if handled
*--------------------------------------
.DO SSCIRQ=1
IRQ ldx DEVSLOTn08F
lda SSC.STATUS-$8F,x
* and #SSC.STATUS.IRQ Useless
bpl .9 IRQ from this device ? no, exit !!!!Applewin bug #308!!!!
bit #SSC.STATUS.RDRF incoming char?
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beq .2
*------------ IRQ In
pha
lda INBUF.HEAD
tay save actual head for later
inc
and #BUF.MASK
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cmp INBUF.TAIL
beq .1 buffer full, discard and exit
sta INBUF.HEAD
lda SSC.DATA-$8F,x read data to clear IRQ
sta INBUF,y
.1 pla
*------------ IRQ Out
.2 bit #SSC.STATUS.TDRE
beq .8 no transmition possible....
ldy OUTBUF.TAIL something to transmit ?
cpy OUTBUF.HEAD
beq .8 in that case, HOW TO CLEAR IRQ ????
lda OUTBUF,y
sta SSC.DATA-$8F,x write data to clear IRQ
tya
inc
and #BUF.MASK
sta OUTBUF.TAIL
.8 clc
rts
.9 sec
rts
.FIN
*--------------------------------------
DRV.CS.END
DEVSLOTn08F .BS 1
.DO SSCIRQ=1
INBUF.TAIL .BS 1
INBUF.HEAD .BS 1
OUTBUF.TAIL .BS 1
OUTBUF.HEAD .BS 1
INBUF .BS BUF.SIZE
OUTBUF .BS BUF.SIZE
.FIN
*--------------------------------------
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DIB .DO SSCIRQ=1
.DA #S.DIB.S.WRITE+S.DIB.S.READ+S.DIB.S.IRQ
.ELSE
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.DA #S.DIB.S.WRITE+S.DIB.S.READ
.FIN
.DA #0,#0,#0
>PSTR "Serial Card/Port"
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.DA #S.DIB.T.CHAR
.DA #0
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.DA K.VER
*--------------------------------------
DCB .DA #S.DCB.T.COM
.DA #0 FLAGS
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.DO SSCIRQ=1
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.DA >9600 BAUD (DWORD)
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.ELSE
.DA >115200
.FIN
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.DA #8 DATA
.DA #1 STOP
.DA #S.DCB.COM.P.NONE PARITY
.DA #S.DCB.COM.C.XONXOFF
*--------------------------------------
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DRV.END
MAN
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SAVE USR/SRC/DRV/X.SSC.DRV.S
LOAD USR/SRC/DRV/SSC.I.DRV.S
ASM