A2osX/DRV/X.SSC.DRV.S.txt
2018-04-14 13:44:24 +01:00

426 lines
7.6 KiB
Plaintext
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

NEW
PREFIX /A2OSX.BUILD
AUTO 4,1
.OP 65C02
.OR $2000
*--------------------------------------
.DO SSCIRQ=1
.TF /A2OSX.BUILD/DRV/SSC.I.DRV
.ELSE
.TF /A2OSX.BUILD/DRV/SSC.DRV
.FIN
*--------------------------------------
.DO SSCIRQ=1
BUF.SIZE .EQ $40
BUF.MASK .EQ $3F
.FIN
*--------------------------------------
ZPTmpPtr1 .EQ ZPDRV
*--------------------------------------
* File Header (16 Bytes)
*--------------------------------------
CS.START cld
jmp Dev.Detect cld,jmp abs=DRV
.DA #$61 6502,Level 1 (65c02)
.DA #1 DRV Layout Version 1
.DA 0
.DA CS.END-CS.START Code Length
.DA DEV.HEADER-CS.START Device Header Offset
.DA DRV.CS.START-CS.START Driver Code Offset
.DA DRV.CS.END-DRV.CS.START Drv Code Length
*--------------------------------------
* Relocation Table
*--------------------------------------
L.MSG.DETECT .DA MSG.DETECT
L.MSG.DETECT.OK .DA MSG.DETECT.OK
L.MSG.DETECT.KO .DA MSG.DETECT.KO
L.DEV.HEADER.NAME .DA DEV.HEADER.NAME
.DA 0 End Of Reloc Table
*--------------------------------------
Dev.Detect >STYA ARGS
>LDYA L.MSG.DETECT
>SYSCALL PrintF.YA
stz ZPTmpPtr1
lda #$C1
sta ZPTmpPtr1+1
.1 and #$0f
tay
lda A2osX.S,y
bne .3
ldx #DEVSIG.Length-1
.2 ldy DEVSIG.Offset,x
lda (ZPTmpPtr1),y
cmp DEVSIG.Value,x
bne .3
dex
bpl .2
bra .4
.3 inc ZPTmpPtr1+1 no match, try next slot....
lda ZPTmpPtr1+1
cmp #$C8
bne .1
>LDYA L.MSG.DETECT.KO
>SYSCALL PrintF.YA
lda #MLI.E.NODEV Not Found in any slot, exiting
sec
rts
.4 lda ZPTmpPtr1+1
and #$0F
pha
tay
lda #A2osX.S.COM
sta A2osX.S,y
pla
ora #$30
sta DEV.HEADER.NAME+3
asl
asl
asl
asl
clc
adc #$8F
sta DEVSLOTn08F
>PUSHW L.DEV.HEADER.NAME
>LDYA L.MSG.DETECT.OK
>SYSCALL PrintF.YA
clc
rts
*--------------------------------------
CS.END
DEVSIG.Offset .HS 05070B0C
DEVSIG.Value .HS 38180131
DEVSIG.Length .EQ DEVSIG.Value-DEVSIG.Offset
MSG.DETECT .DO SSCIRQ=1
.AZ "Apple SSC (Super Serial Card,//c Serial Port) Driver (IRQ Enabled).\r\n"
.ELSE
.AZ "Apple SSC (Super Serial Card,//c Serial Port) Driver.\r\n"
.FIN
MSG.DETECT.OK .AZ "SSC Installed As Device : %s\r\n"
MSG.DETECT.KO .AZ "No SSC Found.\r\n"
ARGS .BS 2
*--------------------------------------
* Device Header (16 Bytes)
*--------------------------------------
DEV.HEADER cld
jmp (DRV.CS.START,x)
.DO SSCIRQ=1
.DA #S.DEV.S.WRITE+S.DEV.S.READ+S.DEV.S.IRQ
.ELSE
.DA #S.DEV.S.WRITE+S.DEV.S.READ
.FIN
.BS 6
DEV.HEADER.NAME .AZ "COM1" NAME
*--------------------------------------
* Driver Code
*--------------------------------------
DRV.CS.START .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
L.STAT .DA STAT
.DA 0 end or relocation
*--------------------------------------
STATUS >LDYA L.STAT
clc
rts
*--------------------------------------
CONTROL clc
rts
*--------------------------------------
OPEN 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
plp
clc
rts
*--------------------------------------
CLOSE php
sei
ldx DEVSLOTn08F
stz SSC.RESET-$8F,x
plp
clc
rts
*--------------------------------------
READ .DO SSCIRQ=1
php
sei
ldx INBUF.TAIL
cpx INBUF.HEAD
beq .2
lda INBUF,x
inx
cpx #BUF.SIZE
bne .1
ldx #0
.1 stx INBUF.TAIL
plp
clc
rts
.2 ldx DEVSLOTn08F
lda SSC.STATUS-$8F,x
and #SSC.STATUS.nDSR true when 0
beq .90
lda #26 EOF
.90 plp
sec
rts
.ELSE
ldx DEVSLOTn08F
lda SSC.STATUS-$8F,x
and #SSC.STATUS.RDRF incoming char?
beq .9
lda SSC.DATA-$8F,x
clc
rts
.9 lda #0
sec
rts
.FIN
*--------------------------------------
WRITE .DO SSCIRQ=1
php
sei
tay save char in Y
ldx DEVSLOTn08F
lda SSC.STATUS-$8F,x
bit #SSC.STATUS.nDSR true when 0
bne .90
lda OUTBUF.HEAD
cmp OUTBUF.TAIL Buffer Empty?
bne .11 not empty, queue char
lda SSC.STATUS-$8F,x
and #SSC.STATUS.TDRE Register Empty ?
beq .10 not empty, queue char
tya yes, write directly to ACIA
sta SSC.DATA-$8F,x
plp
clc
rts
.10 lda OUTBUF.HEAD
.11 tax
inc
and #BUF.MASK
cmp OUTBUF.TAIL
beq .9 Buffer Full!!
sta OUTBUF.HEAD
tya
sta OUTBUF,x
plp
clc
rts
.90 lda #26 EOF
.9 plp
sec
rts
.ELSE
pha
ldx DEVSLOTn08F
.1 lda SSC.STATUS-$8F,x
* and #SSC.STATUS.DCD+SSC.STATUS.DSR
* beq .9
and #SSC.STATUS.TDRE Outgoing char?
beq .1
pla
sta SSC.DATA-$8F,x
clc
rts
.9 pla
sec
rts
.FIN
*--------------------------------------
* 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?
beq .2
*------------ IRQ In
pha
lda INBUF.HEAD
tay save actual head for later
inc
and #BUF.MASK
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
*--------------------------------------
STAT .DO SSCIRQ=1
.DA #S.DSTAT.S.WRITE+S.DSTAT.S.READ+S.DEV.S.IRQ
.ELSE
.DA #S.DSTAT.S.WRITE+S.DSTAT.S.READ
.FIN
.DA #0,#0,#0
>PSTR "Serial Card/Port"
.DA #S.DSTAT.T.CHAR
.DA #0
.DA #0
.DA #91
*--------------------------------------
MAN
SAVE /A2OSX.SRC/DRV/X.SSC.DRV.S
LOAD /A2OSX.SRC/DRV/SSC.I.DRV.S
ASM