mirror of
https://github.com/A2osX/A2osX.git
synced 2024-11-29 17:50:18 +00:00
138 lines
2.9 KiB
Plaintext
138 lines
2.9 KiB
Plaintext
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NEW
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AUTO 3,1
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*--------------------------------------
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.PH $A800
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*--------------------------------
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* I/O VECTORS -- 3 BYTES EACH
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*--------------------------------
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JMP IIE.INIT
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JMP IIE.WARM
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JMP IIE.RDKEY
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JMP S.GET.HORIZ.POSN
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JMP MON.HOME
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JMP MON.CLREOL
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JMP MON.CLREOP
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JMP MON.UP
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JMP MON.LF
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JMP IIE.LEFT
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JMP IIE.RIGHT
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JMP IIE.COUT
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JMP IIE.PICK.SCREEN
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JMP IIE.HTABX
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JMP IIE.HTAB
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JMP IIE.VTAB
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*---Case Toggle MUST go here-----
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RTS
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*--------------------------------
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* VARIABLE LENGTH ROUTINES
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*--------------------------------
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IIE.INIT
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LDA $BF98
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AND #2
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BEQ IO.HOME
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LDA #$99 CTRL-Y
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JMP $C300
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*--------------------------------
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IIE.HTABX
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PHA
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TXA
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JSR IIE.HTAB
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PLA
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RTS
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*--------------------------------
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IIE.HTAB
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BIT $C01F
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BPL .1
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STA $57B
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RTS
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.1 STA CH
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RTS
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*--------------------------------
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S.GET.HORIZ.POSN
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LDA $57B
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BIT $C01F
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BMI .1
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LDA CH
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.1 RTS
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*--------------------------------
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IIE.WARM
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CLD
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LDX CV SAVE CV
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JSR MON.INIT
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TXA GET CV, FALL INTO VTAB
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IIE.VTAB
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STA CV
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JMP MON.VTAB
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*--------------------------------
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IIE.RDKEY
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LDA #40
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BIT $C01F
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BPL .1
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ASL
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.1 STA SCREEN.WIDTH
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JSR MON.RDKEY
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CMP #$FF
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BNE .2
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LDA #$88
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.2 ASL $C061 SET CARRY IF "OPEN APPLE" PRESSED
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ORA #$80
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RTS
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*--------------------------------
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IIE.COUT
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CMP #$80 NORMAL OR INVERSE?
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BCS .2 ...NORMAL
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BIT $C01F ...INVERSE; 40- OR 80-COLUMNS?
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BPL .2 ...40-COLUMN
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PHA ...80-COLUMN
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LDA #$8F SELECT INVERSE DISPLAY
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JSR MON.COUT
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PLA
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CMP #$20 CONTROL CHAR?
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BCS .1 ...NO
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ORA #$40 MAKE PRINTABLE CHARACTER
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.1 ORA #$80
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JSR MON.COUT
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LDA #$8E SELECT NORMAL DISPLAY
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.2 JMP MON.COUT
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*--------------------------------
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IIE.PICK.SCREEN
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BIT $C01F
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BMI .1
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LDA (BASL),Y
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RTS
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.1 TYA
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LSR
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TAY
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PHP
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SEI
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LDA $C055
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BCC .2
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LDA $C054
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.2 LDA (BASL),Y
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BIT $C054
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PLP
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PHA SAVE CHAR FROM SCREEN
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TYA RESTORE Y-REG
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ROL
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TAY
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PLA
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RTS
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*--------------------------------
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IIE.RIGHT
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BIT $C01F IN 80-COLUMN MODE?
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BMI .1 ...YES
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JMP MON.ADVANC
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.1 LDA #$9C FORWARD SPACE
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.HS 2C SKIP TWO BYTES
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*--------------------------------
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IIE.LEFT
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LDA #$88 BACKSPACE
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JMP MON.COUT
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*--------------------------------------
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.EP
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*--------------------------------------
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MAN
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SAVE usr/src/scmasm.31/io.s.iie
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LOAD usr/src/scmasm.31/scmasm.s
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ASM
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