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https://codeberg.org/cryu/micro-sci-a2-controller
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157 lines
3.4 KiB
ArmAsm
157 lines
3.4 KiB
ArmAsm
; da65 V2.11.0 - (C) Copyright 2000-2005, Ullrich von Bassewitz
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; Created: 2022-01-26 21:00:18
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; Input file: xaa
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; Page: 1
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.setcpu "6502"
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.org $c600
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A2L := $3e
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MON_WAIT := $FCA8
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GETLNZ := $FD67
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BELL := $FF3A
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IORTS := $FF58
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GETNUM := $FFA7
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lda #$A3 ; '#'
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sta $33 ; set input-prompt character to '#'
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LC604: jsr BELL
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LC607: jsr GETLNZ ; start new line and take input
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lda #$00
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sta $F2
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LC60E: sta $C010 ; clear keyboard strobe
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sta $F3
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ldy $F2
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jsr GETNUM ; parse hex into A2, A has last char xor $b0
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; plus $89
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sty $F2
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cmp #$C6 ; $C6 from $8D (return)
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beq LC607 ; no more input, go prompt for new input
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cmp #$EC ; 'S'
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beq CMD_S
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cmp #$F0 ; 'W'
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beq CMD_W
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cmp #$F3 ; 'Z'
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beq CMD_Z
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ldy #$7F
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cmp #$06 ; 'M'
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beq CMD_MX
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cmp #$EB ; 'R'
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beq CMD_R
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ldx #$06
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stx $F3
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cmp #$F1 ; 'X'
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beq CMD_MX
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cmp #$EA ; 'Q'
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bne LC604 ; BEEP and prompt for new input
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brk ; 'Q' exits out
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; 'R'
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CMD_R: lda #$50
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sta $FC
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txa
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adc #$00
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sta $F3
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lda #$00
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beq LC651
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; 'S': seek logical-track index in A2L ('22S' seeks logical track $22)
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CMD_S: lda A2L
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asl a
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LC651: sta $F0
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ldy #$FF
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bne CMD_MX
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; 'Z'
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CMD_Z: lda A2L
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asl a
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sta $F1
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ldy #$00
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beq CMD_MX
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LC660: lda #$50
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jsr MON_WAIT
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sta $C088,x
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ldy A2L
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LC66A: jsr MON_WAIT
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dey
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bpl LC66A
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bmi LC68E
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LC672: lda #$00
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beq LC60E
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; 'W'
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CMD_W: lda A2L
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sta $FF
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ldy #$0F
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CMD_MX: sty $09
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jsr IORTS
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tsx
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lda $0100,x
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asl a
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asl a
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asl a
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asl a
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sta $FD
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adc $F3
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tax
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LC68E: sta $C089,x
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lda $09
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beq LC6BA
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bmi LC6BA
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asl a
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bmi LC6AC
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sta $C08F,x
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LC69D: lda $09
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asl a
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bmi LC660
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nop
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nop
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lda $FF
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sta $C08D,x
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cmp $C08C,x
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LC6AC: lda $C000
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eor #$9B
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bne LC69D
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ldx $FD
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sta $C08E,x
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LC6B8: beq LC672
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LC6BA: ldx $FD
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sta $C089,x
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LC6BF: ldy $FC
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LC6C1: cpy $F0
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bne LC6E3
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lda $F0
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sta $FC
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lda $09
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bne LC672
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lda $F0
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ldy $F1
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sta $F1
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sty $F0
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lda $C000
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eor #$9B
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beq LC6B8
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lda #$73
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jsr MON_WAIT
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bcs LC6BF
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LC6E3: bcs LC6E7
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iny
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iny
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LC6E7: dey
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tya
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and #$03
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asl a
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ora $FD
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tax
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lsr a
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lsr a
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sta $C081,x
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nop
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nop
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lda #$56
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jsr MON_WAIT
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sta $C080,x
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bcs LC6C1
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