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https://github.com/mach-kernel/mrbuffer.git
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cleaned up a bit with reliable inx dex branches, but need to look at it
more to figure out the weird text effect
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parent
f12b3f82de
commit
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70
src/main.S
70
src/main.S
@ -23,32 +23,33 @@
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ldal $00C054 ; select text page 1 (there are 2)
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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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ldal $00C056 ; select "low res" graphics
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rep #$30
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* rep #$30
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; show the current char on screen
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; show the current char on screen
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; first check and discard to clear strobe, then enter loop
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; first check and discard to clear strobe, then enter loop
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ldx #0
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ldx #0
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eloop stal $000400,X
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eloop stal $000400,X
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ldal $00C000
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clc
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clc
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cmp $8888
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ldal $00C010
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* bcs down
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bit %1
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bne hndlkey
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jmp eloop
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hndlkey cmp #$1088
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beq down
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clc
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clc
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cmp $9595
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cmp #$1095
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bcs up
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beq up
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jmp eloop
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up inx
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jmp eloop
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jmp eloop
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down dex
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down dex
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dex
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jmp eloop
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up clc
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cpx #50
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bcs eloop
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inx
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inx
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jmp eloop
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jmp eloop
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; working text blit
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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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* 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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* ldy #$0400 ; start of text buffer on 00
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@ -62,6 +63,7 @@ up clc
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SPEAKER equ $E0C030
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SPEAKER equ $E0C030
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PRODOS16 equ $E100A8
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PRODOS16 equ $E100A8
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jsl PRODOS16
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jsl PRODOS16
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; This exit code is "device busy", why is it the only one
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; This exit code is "device busy", why is it the only one
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@ -77,6 +79,48 @@ QP adrl $0000
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da $00
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da $00
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hithere strl "this was excruciating"
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hithere strl "this was excruciating"
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brkboi brk
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