A2osX/DRV/PIC.DRV.S.txt

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PREFIX /A2OSX.BUILD
AUTO 4,1
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.LIST OFF
.OP 65C02
.OR $2000
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.TF DRV/PIC.DRV
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*--------------------------------------
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.INB INC/MACROS.I
.INB INC/A2OSX.I
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.INB INC/MLI.E.I
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*--------------------------------------
ZPTmpPtr1 .EQ ZPDRV
*--------------------------------------
* File Header (16 Bytes)
*--------------------------------------
CS.START cld
jmp Dev.Detect cld,jmp abs=DRV
.DA #$61 6502,Level 1 (65c02)
.DA #1 DRV Layout Version 1
.DA 0
.DA CS.END-CS.START Code Length
.DA DEV.HEADER-CS.START Device Header Offset
.DA DRV.CS.START-CS.START Driver Code Offset
.DA DRV.CS.END-DRV.CS.START Drv Code Length
*--------------------------------------
* Relocation Table
*--------------------------------------
L.MSG.DETECT .DA MSG.DETECT
L.MSG.DETECT.OK .DA MSG.DETECT.OK
L.MSG.DETECT.KO .DA MSG.DETECT.KO
L.DEV.HEADER.NAME .DA DEV.HEADER.NAME
.DA 0 End Of Reloc Table
*--------------------------------------
Dev.Detect >STYA ARGS
>LDYA L.MSG.DETECT
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>SYSCALL printf
stz ZPTmpPtr1
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lda #$C1
sta ZPTmpPtr1+1
.1 and #$0f
tay
lda A2osX.S,y
bne .3
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ldx #DEVSIG.Length-1
.2 ldy DEVSIG.Offset,x
lda (ZPTmpPtr1),y
cmp DEVSIG.Value,x
bne .3
dex
bpl .2
bra .4
.3 inc ZPTmpPtr1+1 no match, try next slot....
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lda ZPTmpPtr1+1
cmp #$C8
bne .1
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>LDYA L.MSG.DETECT.KO
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>SYSCALL printf
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lda #MLI.E.NODEV Not Found in any slot, exiting
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sec
rts
.4 lda ZPTmpPtr1+1
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and #$0F
pha
tay
lda #A2osX.S.COM
sta A2osX.S,y
pla
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ora #$30
sta DEV.HEADER.NAME+4
asl
asl
asl
asl
sta DEVSLOTn0
>PUSHW L.DEV.HEADER.NAME
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>LDYA L.MSG.DETECT.OK
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>SYSCALL printf
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clc
rts
*--------------------------------------
CS.END
DEVSIG.Offset .HS 0507
DEVSIG.Value .HS 4848
DEVSIG.Length .EQ DEVSIG.Value-DEVSIG.Offset
MSG.DETECT .AZ "Apple PIC (Parallel Interface Card).\r\n"
MSG.DETECT.OK .AZ "PIC Installed As Device : %S\r\n"
MSG.DETECT.KO .AZ "No PIC Found.\r\n"
ARGS .BS 2
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*--------------------------------------
* Device Header (16 Bytes)
*--------------------------------------
DEV.HEADER cld
jmp (DRV.CS.START,x)
.DA #S.DEV.S.WRITE
.BS 6
DEV.HEADER.NAME >PSTR "LPT1"
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*--------------------------------------
* Driver Code
*--------------------------------------
DRV.CS.START .DA STATUS
.DA A2osX.BADCALL
.DA A2osX.BADCALL
.DA A2osX.BADCALL
.DA CONTROL
.DA A2osX.BADCALL
.DA OPEN
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.DA CLOSE
.DA A2osX.BADCALL
.DA WRITE
L.STAT .DA STAT
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.DA 0 end or relocation
*--------------------------------------
STATUS >LDYA L.STAT
clc
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rts
*--------------------------------------
CONTROL
clc
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rts
*--------------------------------------
OPEN
clc
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rts
*--------------------------------------
CLOSE
clc
rts
*--------------------------------------
WRITE
clc
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rts
*--------------------------------------
DRV.CS.END
DEVSLOT0n .BS 1
DEVSLOTCn .BS 1
DEVSLOTn0 .BS 1
*--------------------------------------
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STAT .DA #S.DIB.S.WRITE
.DA #0,#0,#0
>PSTR "Parallel Card"
.DA #0,#0,#0
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.DA #S.DIB.T.CHAR
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.DA #0
.DA $0900
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*--------------------------------------
MAN
SAVE /A2OSX/SRC/DRV/PIC.DRV.S
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ASM