A2osX/DRV/SSC.DRV.S.txt

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PR#3
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PREFIX /A2OSX.SRC
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NEW
INC 1
AUTO 6
.LIST OFF
.OP 65C02
.OR $2000
.TF /A2OSX.BOOT/DRV/SSC.DRV
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*--------------------------------------
.INB INC/MACROS.I
.INB INC/A2OSX.I
*--------------------------------------
ZPTmpPtr1 .EQ ZPDRV
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*--------------------------------------
* 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.TDRE .EQ %00010000
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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.TENOIRQ .EQ %00001000
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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
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*--------------------------------------
* File Header (16 Bytes)
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*--------------------------------------
CS.START cld
jmp Dev.Detect cld,jmp abs=DRV
.DA #$61 6502,Level 1 (65c02)
.DA #1 DRV Layout Version 1
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.DA 0
.DA CS.END-CS.START Code Length
.DA DEV.HEADER-CS.START Device Header Offset
.DA DRV.CS.START-CS.START Driver Code Offset
.DA DRV.CS.END-DRV.CS.START Drv Code Length
*--------------------------------------
* Relocation Table
*--------------------------------------
L.MSG.DETECT .DA MSG.DETECT
L.MSG.DETECT.OK .DA MSG.DETECT.OK
L.MSG.DETECT.KO .DA MSG.DETECT.KO
L.DEV.HEADER.NAME .DA DEV.HEADER.NAME
.DA 0 End Of Reloc Table
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*--------------------------------------
Dev.Detect sta hArgs
>LDYA L.MSG.DETECT
>SYSCALL SYS.PSTROutYA
stz ZPTmpPtr1
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lda #$C1
sta ZPTmpPtr1+1
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.1 ldx #DEVSIG.Length-1
.2 ldy DEVSIG.Offset,x
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lda (ZPTmpPtr1),y
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cmp DEVSIG.Value,x
bne .3
dex
bpl .2
bra .4
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.3 inc ZPTmpPtr1+1 no match, try next slot....
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lda ZPTmpPtr1+1
cmp #$C8
bne .1
>LDYA L.MSG.DETECT.KO
>SYSCALL SYS.PSTROutYA
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lda #DEVMGR.ERRNOHW Not Found in any slot, exiting
sec
rts
.4 lda ZPTmpPtr1+1
sta DEVSLOTCn
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and #$0F
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sta DEVSLOT0n
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ora #$30
sta DEV.HEADER.NAME+4
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asl
asl
asl
asl
sta DEVSLOTn0
>LDYA L.MSG.DETECT.OK
>SYSCALL SYS.PSTROutYA
>LDYA L.DEV.HEADER.NAME
>SYSCALL SYS.PSTROutYA
lda #13
>SYSCALL SYS.COutA
clc
rts
*--------------------------------------
CS.END
DEVSIG.Offset .HS 05070B0C
DEVSIG.Value .HS 38180131
DEVSIG.Length .EQ DEVSIG.Value-DEVSIG.Offset
MSG.DETECT >PSTRING "Apple SSC (Super Serial Card,//c Serial Port) Driver.\n"
MSG.DETECT.OK >PSTRING "SSC Installed As Device : "
MSG.DETECT.KO >PSTRING "No SSC Found.\n"
hArgs .BS 1
*--------------------------------------
* Device Header (16 Bytes)
*--------------------------------------
DEV.HEADER cld
jmp (DRV.CS.START,x)
.DA #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 ldx DEVSLOTn0
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php
sei
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stz SSC.REG.RESET,x
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lda #$1E
sta SSC.REG.CTL,x
ldx DEVSLOTn0
lda #SSC.REG.CMD.TENOIRQ+SSC.REG.CMD.RIRQDIS
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sta SSC.REG.CMD,x
lda SSC.REG.STATUS,x clear any IRQ pending
bmi *
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plp
clc
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rts
*--------------------------------------
GETEVENT ldx DEVSLOTn0
lda SSC.REG.STATUS,x
bmi *
and #SSC.REG.STATUS.RDRF incoming char?
beq .9
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lda SSC.REG.DATA,x
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ldy #S.EVT.DATA
sta (pEvent),y
iny
lda #0
sta (pEvent),y
lda #S.EVT.F.KEY
sta (pEvent)
clc
rts
.9 lda #0
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sec
rts
*--------------------------------------
COUT pha
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ldx DEVSLOTn0
.1 lda SSC.REG.STATUS,x
bmi *
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and #SSC.REG.STATUS.DCD+SSC.REG.STATUS.DSR
beq .9
and #SSC.REG.STATUS.TDRE Outgoing char?
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bne .1
pla
sta SSC.REG.DATA,x
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clc
rts
.9 pla
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sec
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rts
*--------------------------------------
CLOSE php
sei
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ldx DEVSLOTn0
stz SSC.REG.RESET,x
plp
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clc
rts
*--------------------------------------
GETINFO >LDYA L.DEVINFO
IRQ clc
rts
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*--------------------------------------
DRV.CS.END
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DEVSLOT0n .BS 1
DEVSLOTCn .BS 1
DEVSLOTn0 .BS 1
DEVINFO .DA #S.DEVINFO.TYPE.CHAR
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.DA #0
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*--------------------------------------
MAN
SAVE DRV/SSC.DRV.S
ASM