mirror of
https://github.com/A2osX/A2osX.git
synced 2024-10-31 23:09:33 +00:00
167 lines
3.8 KiB
Plaintext
167 lines
3.8 KiB
Plaintext
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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STB.SCREEN.WIDTH .EQ $A5
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*--------------------------------
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STB.SLOT .EQ 3
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*--------------------------------
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STB.HORIZ .EQ $05F8+STB.SLOT
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STB.ESCBYT .EQ $06F8+STB.SLOT
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STB.FLAGS .EQ $0778+STB.SLOT
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*--------------------------------
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STB.ENTRY .EQ STB.SLOT*256+$C000
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STB.RDKEY1 .EQ STB.SLOT*256+$C005
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STB.COUT1 .EQ STB.SLOT*256+$C019
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STB.SCREEN .EQ STB.SLOT*256+$C031
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*--------------------------------
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* I/O VECTORS -- 3 BYTES EACH
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*--------------------------------
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JMP STB.INIT
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JMP STB.WARM
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JMP STB.READ.KEY.WITH.CASE
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JMP STB.GET.HORIZ.POSN
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LDA #$8C ^L--HOME
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.HS 2C
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LDA #$9D ^]--CLREOL
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.HS 2C
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LDA #$8B ^K--CLREOP
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.HS 2C
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LDA #$9F ^_--UP
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.HS 2C
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LDA #$8A ^J--DOWN
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.HS 2C
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LDA #$88 ^H--LEFT
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.HS 2C
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LDA #$9C ^\--RIGHT
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NOP
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JMP MON.COUT
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JMP STB.PICK.SCREEN
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JMP STB.HTABX
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JMP STB.HTAB
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JMP STB.VTAB
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*---Case Change MUST go here-----
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LDA STB.FLAGS
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EOR #$40
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STA STB.FLAGS
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RTS
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*--------------------------------
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* VARIABLE LENGTH ROUTINES
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*--------------------------------
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STB.HTABX
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PHA
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TXA
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JSR STB.HTAB
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PLA
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RTS
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*--------------------------------
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STB.GET.HORIZ.POSN
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LDA STB.HORIZ
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RTS
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*--------------------------------
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STB.VTAB
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STA CV
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LDA STB.HORIZ
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STB.HTAB
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PHA SAVE HORIZ POSN
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LDA #$9E
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JSR STB.COUT1
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PLA GET HORIZ POSN
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JSR .1
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LDA CV
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.1 CLC
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ADC #$A0
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JMP STB.COUT1
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*--------------------------------
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STB.INIT
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LDA #80
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STA STB.SCREEN.WIDTH
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LDA #$8C CLEAR SCREEN AND START STB-80
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JSR STB.ENTRY
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LDA #0
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STA STB.ESCBYT DISABLE ^A AND ESC-MODE
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LDA #2 DISABLE "HOME" SENSING
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STA STB.FLAGS
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STB.INSTALL.VECTORS
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LDX #1
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.1 LDA STB.VECTORS,X
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STA $36,X
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STA STB.SLOT*2+$BE10,X
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LDA STB.VECTORS+2,X
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BIT F.EXEC
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BMI .2
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STA $38,X
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.2 STA STB.SLOT*2+$BE20,X
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DEX
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BPL .1
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RTS
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*--------------------------------
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STB.VECTORS .DA STB.COUT
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.DA STB.RDKEY
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*--------------------------------
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STB.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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JMP STB.INSTALL.VECTORS
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*--------------------------------
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* READ KEY WITH CASE CONTROL
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*--------------------------------
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STB.READ.KEY.WITH.CASE
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JSR MON.RDKEY
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ORA #$80 REQUIRED FOR EXEC FILES
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CLC SIGNAL NO OPEN APPLE
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RTS
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*--------------------------------
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STB.RDKEY
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CLD
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LDA #$0A
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STA STB.SLOT*16+$C080
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LDA #$07 SOLID DBL LINE CURSOR
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STA STB.SLOT*16+$C081
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JSR STB.RDKEY1
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ORA #$80 Make sure it looks right
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PHA
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LDA #$0A
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STA STB.SLOT*16+$C080
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LDA #$20 CURSOR OFF
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STA STB.SLOT*16+$C081
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PLA
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RTS
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*--------------------------------
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STB.COUT
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CLD
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CMP #$80 NORMAL OR INVERSE?
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BCS .1 ...NORMAL
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PHA ...80-COLUMN
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LDA #$8F SELECT INVERSE DISPLAY
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JSR STB.COUT1
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PLA
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ORA #$80 MAKE PRINTABLE CHARACTER
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CMP #$A0
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BCS .2
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ORA #$40
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.2 JSR STB.COUT1
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LDA #$8E SELECT NORMAL DISPLAY
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.1 JMP STB.COUT1
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*--------------------------------
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STB.PICK.SCREEN
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STX $481
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TYA
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STA $482
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JSR STB.HTAB
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JSR STB.SCREEN
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LDY $482
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LDX $481
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RTS
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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.30/io.s.stb80
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LOAD usr/src/scmasm.30/scmasm.s
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ASM
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