2018-01-17 00:52:31 +00:00
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rel
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typ $B3
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dsk main.l
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2018-01-15 15:58:58 +00:00
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2018-01-29 00:57:31 +00:00
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; ensure 16-bit mode (unnecessary?)
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2018-01-18 22:01:26 +00:00
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clc
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xce
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2018-02-05 02:25:37 +00:00
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rep #$30
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2018-01-18 22:01:26 +00:00
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2018-01-17 00:52:31 +00:00
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phk
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plb
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2018-01-15 15:58:58 +00:00
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2018-01-28 03:41:56 +00:00
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; half bank for accumulator, you don't want to toggle them on then back off, right?
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sep #$30
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2018-01-18 22:01:26 +00:00
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2018-01-27 02:25:23 +00:00
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; toggle the softswitches; they don't take any values. some are only triggered
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; by writes, $C054 can be triggered by a read
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2018-01-28 03:41:56 +00:00
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stal $00C000 ; disable 80 column store?
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2018-01-18 22:01:26 +00:00
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2018-01-28 03:41:56 +00:00
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stal $00C00C ; disable 80 column hardware?!
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stal $00C050 ; set standard apple ii gfx mode
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stal $00C051 ; select text mode only. "only"?
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ldal $00C054 ; select text page 1 (there are 2)
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ldal $00C056 ; select "low res" graphics
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2018-01-29 04:13:32 +00:00
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2018-02-05 02:25:37 +00:00
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rep #$30
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sep #$20
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2018-01-17 06:07:57 +00:00
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2018-01-29 00:57:31 +00:00
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; show the current char on screen
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2018-02-01 04:47:06 +00:00
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; read keyboard then hit strobe to reset
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2018-01-29 04:13:32 +00:00
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ldx #0
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2018-02-01 04:47:06 +00:00
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ldal $00C010
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2018-01-29 00:57:31 +00:00
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2018-02-04 22:00:31 +00:00
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inloop clc
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ldal $00C000
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bit #%1
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bmi keybranch
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jmp inloop
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keybranch jsr keydown
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jmp inloop
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keydown nop
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2018-02-05 00:21:35 +00:00
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cmp #$8B ; up
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beq up
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cmp #$8A ; down
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beq down
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cmp #$88 ; left
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beq left
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cmp #$95 ; right
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beq right
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jmp dispchar
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2018-02-05 02:25:37 +00:00
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up clc
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2018-02-06 04:11:30 +00:00
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phy
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ldy #0
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jsr updown
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ply
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2018-02-05 00:21:35 +00:00
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jmp rtsout
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2018-02-06 04:11:30 +00:00
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2018-02-05 01:06:37 +00:00
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down clc
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2018-02-06 04:11:30 +00:00
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phy
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ldy #1
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jsr updown
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ply
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jmp rtsout
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updown clc
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2018-02-05 01:06:37 +00:00
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cpx #1488
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beq rtsout
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2018-02-05 02:25:37 +00:00
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rep #$30
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2018-02-05 01:06:37 +00:00
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pha
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txa
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2018-02-06 04:11:30 +00:00
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cpy #0
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beq linedown
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bne lineup
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lineup adc #128
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jmp linecont
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linedown sbc #128
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linecont tax
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2018-02-05 01:06:37 +00:00
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pla
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2018-02-05 02:25:37 +00:00
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sep #$20
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2018-02-05 00:21:35 +00:00
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jmp rtsout
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left clc
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cpx #0
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beq rtsout
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dex
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jmp rtsout
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right clc
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cpx #39
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beq rtsout
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inx
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jmp rtsout
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dispchar stal $000400,X
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2018-02-05 01:06:37 +00:00
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inx
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2018-02-05 00:21:35 +00:00
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jmp rtsout
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rtsout ldal $00C010
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lda #0
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2018-02-01 04:47:06 +00:00
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rts
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2018-01-30 04:20:16 +00:00
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2018-01-29 00:57:31 +00:00
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; working text blit
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* ldx #hithere+2 ; strl, first two bytes are strlen, # denotes immediate addr val
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* ldy #$0400 ; start of text buffer on 00
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* ldal hithere
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* dec
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2018-01-27 02:25:23 +00:00
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2018-01-29 00:57:31 +00:00
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* mvn $02, $00
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* brk
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2018-01-27 02:25:23 +00:00
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2018-01-17 00:52:31 +00:00
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; Important locations
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SPEAKER equ $E0C030
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PRODOS16 equ $E100A8
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2018-01-15 15:58:58 +00:00
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2018-01-30 04:20:16 +00:00
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2018-01-17 00:52:31 +00:00
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jsl PRODOS16
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2018-01-28 22:29:30 +00:00
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; This exit code is "device busy", why is it the only one
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; that works?!
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2018-01-17 00:52:31 +00:00
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da $29
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adrl QP
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2018-01-15 15:58:58 +00:00
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bcs ERROR
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2018-01-17 00:52:31 +00:00
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ERROR brk
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2018-01-15 15:58:58 +00:00
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QP adrl $0000
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2018-01-17 00:52:31 +00:00
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da $00
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2018-01-28 16:40:43 +00:00
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hithere strl "this was excruciating"
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2018-01-30 04:20:16 +00:00
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brkboi brk
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