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fireworks: can toggle sound now

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This commit is contained in:
Vince Weaver 2018-09-12 11:50:44 -04:00
parent d55c2b94c3
commit a14cca0746
1 changed files with 15 additions and 3 deletions
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18
fireworks/fireworks.s
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@ -287,13 +287,25 @@ check_keyboard:
lda KEYPRESS ; 4
bpl no_keypress ; 3
jmp loop_forever
jmp restart
no_keypress:
jmp display_loop ; 3
loop_forever:
jmp loop_forever
; Restart and toggle sound
restart:
; self mofifying code, flip from bit C030 to bit 0030
lda sound1+2
eor #$C0
sta sound1+2
lda sound2+2
eor #$C0
sta sound2+2
jmp setup_background
jump_table: