mirror of
https://github.com/A2osX/A2osX.git
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113 lines
2.0 KiB
Plaintext
113 lines
2.0 KiB
Plaintext
PR#3
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PREFIX /A2OSX.BUILD
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NEW
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INC 1
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AUTO 6
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.LIST OFF
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.OP 65C02
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.OR $2000
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.TF DRV/SSC.DRV
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*--------------------------------------
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.INB INC/MACROS.I
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.INB INC/A2OSX.I
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*--------------------------------------
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ZPTmpPtr1 .EQ ZPDRV
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*--------------------------------------
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SIG.05 .EQ $38
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SIG.07 .EQ $18
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SIG.0B .EQ $01
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SIG.0C .EQ $31
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*--------------------------------------
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* Main DRV entry point
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* input :
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* X = CMD
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* 0 : OPEN
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* 2 : GETEVENT
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* 4 : OUT
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* 6 : CLOSE
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*--------------------------------------
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* CLD $D8
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* JMP (*,x) $7C
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* #JMPTABLE
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* /JMPTABLE
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*--------------------------------------
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CS.START cld
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jmp (.1,x)
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.1 .DA OPEN
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.DA GETEVENT
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.DA OUT
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.DA CLOSE
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.DA 0 end or relocation
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.DA CS.END-CS.START
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*--------------------------------------
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OPEN stz ZPTmpPtr1
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lda #$C1
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sta ZPTmpPtr1+1
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.1 ldy #5
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lda (ZPTmpPtr1),y
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cmp #SIG.05
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bne .2
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ldy #7
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lda (ZPTmpPtr1),y
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cmp #SIG.07
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bne .2
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ldy #$B
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lda (ZPTmpPtr1),y
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cmp #SIG.0B
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bne .2
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ldy #$C
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lda (ZPTmpPtr1),y
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cmp #SIG.0C
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beq .3
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.2 inc ZPTmpPtr1+1
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lda ZPTmpPtr1+1
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cmp #$C8
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bne .1
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beq .99
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.3 lda ZPTmpPtr1+1
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and #$0F
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sta DEVSLOT
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ora #$30
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sta DEVNAME+4
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lda #S.DEV.F.CHAR+S.DEV.F.OUT
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sta (pDevContext)
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ldy #S.DEV.NAME
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ldx #0
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.7 lda DEVNAME,x
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sta (pDevContext),y
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cpx DEVNAME
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beq .8
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inx
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iny
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bne .7
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.8 clc
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rts
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.99 lda #DEVMGR.ERRNOHW
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sec
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rts
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*--------------------------------------
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GETEVENT lda #0
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sec
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rts
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*--------------------------------------
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OUT clc
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rts
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*--------------------------------------
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CLOSE clc
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rts
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*--------------------------------------
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CS.END
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DEVNAME >PSTRING "COM0"
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DEVSLOT .BS 1
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*--------------------------------------
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MAN
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SAVE DRV/SSC.DRV.S
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ASM
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