mirror of
https://github.com/A2osX/A2osX.git
synced 2024-10-31 23:09:33 +00:00
116 lines
3.3 KiB
Plaintext
116 lines
3.3 KiB
Plaintext
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NEW
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AUTO 3,1
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*--------------------------------------
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* I/O VECTORS -- 3 BYTES EACH
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*--------------------------------
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IO.INIT JMP S.IO.INIT
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IO.WARM JMP S.IO.WARM
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READ.KEY.WITH.CASE JMP S.READ.KEY.WITH.CASE
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GET.HORIZ.POSN LDA CH
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RTS
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IO.HOME JMP MON.HOME
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IO.CLREOL JMP MON.CLREOL
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IO.CLREOP JMP MON.CLREOP
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IO.UP JMP MON.UP
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IO.DOWN JMP MON.LF
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IO.LEFT JMP MON.BS
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IO.RIGHT JMP MON.ADVANC
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IO.COUT JMP MON.COUT
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IO.PICK.SCREEN LDA (BASL),Y
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RTS
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IO.HTABX STX CH
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RTS
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IO.HTAB STA CH
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RTS
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IO.VTAB JMP S.IO.VTAB
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IO.CASE.TOGGLE LDA LC.MODE
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EOR #$FF
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STA LC.MODE
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RTS
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*--------------------------------
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* VARIABLE LENGTH ROUTINES
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* (ENTERED THROUGH VECTORS)
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*--------------------------------
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S.IO.VTAB
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STA CV
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JMP MON.VTAB
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*--------------------------------
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S.IO.INIT
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LDA #40
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STA SCREEN.WIDTH
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JSR MON.SETKBD
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JSR MON.SETVID
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JSR MON.INIT
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JMP MON.HOME
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*--------------------------------
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S.IO.WARM
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CLD
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LDX CV
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JSR MON.INIT
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STX CV
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STX LC.MODE POSITIVE VALUE
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JSR MON.VTAB
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RTS
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*--------------------------------
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* READ KEY WITH CASE CONTROL
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*--------------------------------
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S.READ.KEY.WITH.CASE
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LDA $BE43 See if "EXEC" in progress
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BMI .1 ...Yes, use straight input
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LDA LC.MODE
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BMI .2 Yes, use fancy translation
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.1 JSR MON.RDKEY
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ORA #$80 Make sure it looks right
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CLC SIGNAL "NO OPEN APPLE PRESSED"
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RTS
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*--------------------------------
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.2
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LDY CH Set up cursor
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LDA (BASL),Y Char from screen
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PHA
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CMP #$E0 ELIMINATE CASE
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BCC .25
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AND #$DF
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.25 AND #$3F Make it flash
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ORA #$40
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STA (BASL),Y
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PLA
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JSR MON.READCH
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BIT $C063 Shift key down?
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BPL .4 Yes
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CMP #$C0 No, lower case if letter
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BCC .3
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ORA #$20
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CLC SIGNAL "NO OPEN APPLE PRESSED"
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.3 RTS
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*--------------------------------
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.4 CMP #$C0 Shift key down
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BCC .8 Not a letter key
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BEQ .7 Shift-P
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CMP #$DD Shift-M
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BEQ .5 Yes
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CMP #$DE Shift-N
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BNE .6 No
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.5 AND #$EF Make capital-M or -N
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.6 CLC SIGNAL "NO OPEN APPLE PRESSED"
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RTS
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*--------------------------------
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.7 LDA #$D0 Make capital-P
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CLC SIGNAL "NO OPEN APPLE PRESSED"
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RTS
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*--------------------------------
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.8 CMP #$87 Look for control-shift-A thru -F
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BCS .10 No
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CMP #$81 Control-A
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BCC .10 No, control-P
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BNE .9 No, control-B thru -F
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LDA #$C0-$58-1 Control-shift-A = at-sign (@)
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.9 ADC #$58
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.10 CLC SIGNAL "NO OPEN APPLE PRESSED"
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RTS
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*--------------------------------------
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MAN
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SAVE usr/src/scmasm.31/scmasm.s.iostd
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LOAD usr/src/scmasm.31/scmasm.s
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ASM
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