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A2osX/DRV/SSC.DRV.S.txt

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PR#3
PREFIX /A2OSX.SRC
NEW
INC 1
AUTO 6
.LIST OFF
.OP 65C02
.OR $2000
.TF /A2OSX.BOOT/DRV/SSC.DRV
*--------------------------------------
.INB INC/MACROS.I
.INB INC/A2OSX.I
.INB INC/A2OSX.API.I
*--------------------------------------
BUF.SIZE .EQ $20
BUF.MASK .EQ $1F
*--------------------------------------
ZPGoCard .EQ ZPDRV
ZPTmpPtr1 .EQ ZPDRV+2
*--------------------------------------
* Pascal 1.1 Protocol
*--------------------------------------
SSC.INIT .EQ $0D
SSC.READ .EQ $0E
SSC.WRITE .EQ $0F
SSC.STATUS .EQ $10
*--------------------------------------
* SSC/ACIA I/O
*--------------------------------------
SSC.REG.DIPSW1 .EQ $C081 R
SSC.REG.DIPSW2 .EQ $C082 R
SSC.REG.DATA .EQ $C088 R,W
SSC.REG.RESET .EQ $C089 W
SSC.REG.STATUS .EQ $C089 R
SSC.REG.STATUS.IRQ .EQ %10000000
SSC.REG.STATUS.DSR .EQ %01000000
SSC.REG.STATUS.DCD .EQ %00100000
SSC.REG.STATUS.TDRF .EQ %00010000
SSC.REG.STATUS.RDRF .EQ %00001000
SSC.REG.STATUS.OE .EQ %00000100
SSC.REG.STATUS.FE .EQ %00000010
SSC.REG.STATUS.PE .EQ %00000001
SSC.REG.CMD .EQ $C08A W
SSC.REG.CMD.ODDP .EQ %00100000
SSC.REG.CMD.EVENP .EQ %01100000
SSC.REG.CMD.MARKP .EQ %10100000
SSC.REG.CMD.SPACEP .EQ %11100000
SSC.REG.CMD.ECHO .EQ %00010000
SSC.REG.CMD.TE .EQ %00001000
SSC.REG.CMD.TEIRQ .EQ %00000100
SSC.REG.CMD.TBRK .EQ %00001100
SSC.REG.CMD.RIRQDIS .EQ %00000010
SSC.REG.CMD.DTR .EQ %00000001
SSC.REG.CTL .EQ $C08B W
*--------------------------------------
* File Header (16 Bytes)
*--------------------------------------
CS.START cld
jmp Dev.Detect cld,jmp abs=DRV
.DA #$61 6502,Level 1 (65c02)
.DA #1 DRV Layout Version 1
.DA 0
.DA CS.END-CS.START Code Length
.DA DEV.HEADER-CS.START Device Header Offset
.DA DRV.CS.START-CS.START Driver Code Offset
.DA DRV.CS.END-DRV.CS.START Drv Code Length
*--------------------------------------
* Relocation Table
*--------------------------------------
L.MSG.DETECT .DA MSG.DETECT
.DA 0 End Of Reloc Table
*--------------------------------------
Dev.Detect sta hArgs
>LDYA L.MSG.DETECT
>SYSCALL SYS.SysScrPPSTRYA
stz ZPTmpPtr1
lda #$C1
sta ZPTmpPtr1+1
.1 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
lda #DEVMGR.ERRNOHW Not Found in any slot, exiting
sec
rts
.4 lda ZPTmpPtr1+1
sta DEVSLOTCn
and #$0F
sta DEVSLOT0n
ora #$30
sta DEV.HEADER.NAME+4
asl
asl
asl
asl
sta DEVSLOTn0
clc
rts
*--------------------------------------
CS.END
DEVSIG.Offset .HS 05070B0C
DEVSIG.Value .HS 38180131
DEVSIG.Length .EQ DEVSIG.Value-DEVSIG.Offset
MSG.DETECT >PSTRING "\nApple Super Serial Card Driver."
hArgs .BS 1
*--------------------------------------
* Device Header (16 Bytes)
*--------------------------------------
DEV.HEADER cld
jmp (DRV.CS.START,x)
.DA #S.DEV.F.IRQ+S.DEV.F.EVENT+S.DEV.F.COUT+S.DEV.F.CHAR
DEV.HEADER.NAME >PSTRING "COM1" NAME
.HS 00.00
.HS 00.00.00.00
*--------------------------------------
* Driver Code
*--------------------------------------
DRV.CS.START .DA OPEN
.DA GETEVENT
.DA COUT
.DA CLOSE
.DA GETINFO
.DA IRQ
L.DEVINFO .DA DEVINFO
.DA 0 end or relocation
*--------------------------------------
OPEN
* ldy #SSC.INIT
* jsr GoCard
ldx DEVSLOTn0
stz SSC.REG.RESET,x
lda #$1E
sta SSC.REG.CTL,x
stz INBUF.PTR
stz INBUF.CNT
stz OUTBUF.PTR
stz OUTBUF.CNT
php
sei
ldx DEVSLOTn0
lda #SSC.REG.CMD.TEIRQ+SSC.REG.CMD.DTR
sta SSC.REG.CMD,x
lda SSC.REG.STATUS,x clear any IRQ pending
plp
.8 clc
rts
*--------------------------------------
GETEVENT php
sei
lda INBUF.CNT
beq .9
ldx INBUF.PTR
lda INBUF,x
ldy #S.EVT.DATA
sta (pEvent),y
iny
lda #0
sta (pEvent),y
lda #S.EVT.F.KEY
sta (pEvent)
inx
cpx #BUF.SIZE
bne .1
ldx #0
.1 stx INBUF.PTR
dec INBUF.CNT
plp
clc
rts
.9 plp
lda #0
sec
rts
*--------------------------------------
COUT php
sei
ldx DEVSLOTn0
lda SSC.REG.STATUS,x
and #SSC.REG.STATUS.DCD+SSC.REG.STATUS.DSR
beq .9
ldx OUTBUF.CNT
cpx #BUF.SIZE
beq .9
>PULLA
ldx OUTBUF.PTR
sta OUTBUF,x
inx
cpx #BUF.SIZE
bne .1
ldx #0
.1 stx OUTBUF.PTR
inc OUTBUF.CNT
plp
clc
rts
.9 >PULLA
plp
sec
rts
*--------------------------------------
CLOSE clc
rts
*--------------------------------------
GETINFO >LDYA L.DEVINFO
clc
rts
*--------------------------------------
* IRQ Handler
* on exit, CS if handled
*--------------------------------------
IRQ cld
ldx DEVSLOTn0
lda SSC.REG.STATUS,x IRQ from this device ?
* bpl .9 no, exit
pha save status ...
and #SSC.REG.STATUS.RDRF incoming char?
beq .1
ldy SSC.REG.DATA,x read data to clear IRQ
lda INBUF.CNT
cmp #BUF.SIZE
beq .1 buffer full, discard
phy
clc
adc INBUF.PTR
and #BUF.MASK
tay
pla get back data
sta INBUF,y
inc INBUF.CNT
.1 pla get back status
and #SSC.REG.STATUS.TDRF
beq .8
lda OUTBUF.CNT something to transmit ?
beq .8 no, exit
clc
adc OUTBUF.PTR
and #BUF.MASK
tay
lda OUTBUF,Y
sta SSC.REG.DATA,x
dec INBUF.CNT
.8 clc
rts
.9 sec
rts
*--------------------------------------
* PRIVATE
*--------------------------------------
GOCARD sta $CFFF Prevent SSC firmware bug
pha
stz ZPGoCard
ldx DEVSLOTCn
stx ZPGoCard+1
lda (ZPGoCard),y
sta ZPGoCard
ldy DEVSLOTn0
pla
jmp (ZPGoCard)
*--------------------------------------
DRV.CS.END
DEVSLOT0n .BS 1
DEVSLOTCn .BS 1
DEVSLOTn0 .BS 1
INBUF.PTR .BS 1
INBUF.CNT .BS 1
OUTBUF.PTR .BS 1
OUTBUF.CNT .BS 1
INBUF .BS BUF.SIZE
OUTBUF .BS BUF.SIZE
DEVINFO .DA #S.DEVINFO.TYPE.CHAR
.DA #0
*--------------------------------------
MAN
SAVE DRV/SSC.DRV.S
ASM
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