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figure out how to modeset but still need to toggle to get full bank a for adding, unelegant perhaps?

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This commit is contained in:
David Stancu 2018-02-04 21:25:37 -05:00
parent b8063ff72f
commit 85da0e6b65
1 changed files with 30 additions and 3 deletions
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33
src/main.S
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@ -5,7 +5,7 @@
; ensure 16-bit mode (unnecessary?) ; ensure 16-bit mode (unnecessary?)
clc clc
xce xce
rep #$20 rep #$30
phk phk
plb plb
@ -23,7 +23,8 @@
ldal $00C054 ; select text page 1 (there are 2) ldal $00C054 ; select text page 1 (there are 2)
ldal $00C056 ; select "low res" graphics ldal $00C056 ; select "low res" graphics
* rep #$30 rep #$30
sep #$20
; show the current char on screen ; show the current char on screen
; read keyboard then hit strobe to reset ; read keyboard then hit strobe to reset
@ -49,16 +50,27 @@ keydown nop
beq right beq right
jmp dispchar jmp dispchar
up nop up clc
cpx #1488
beq rtsout
rep #$30
pha
txa
sbc #128
tax
pla
sep #$20
jmp rtsout jmp rtsout
down clc down clc
cpx #1488 cpx #1488
beq rtsout beq rtsout
rep #$30
pha pha
txa txa
adc #128 adc #128
tax tax
pla pla
sep #$20
jmp rtsout jmp rtsout
left clc left clc
@ -269,6 +281,21 @@ brkboi brk