mirror of
https://github.com/irmen/prog8.git
synced 2024-07-21 01:29:03 +00:00
39 lines
692 B
Lua
39 lines
692 B
Lua
%import textio
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%zeropage dontuse
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%option no_sysinit
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main {
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; $1F9C0 - $1F9FF PSG registers
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sub start() {
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uword color=0
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repeat {
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cx16.vpoke(1, $fa00+6*2, lsb(color))
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cx16.vpoke(1, $fa01+6*2, msb(color))
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color++
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}
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;c64.set_rasterirq(&irq.irq, 100, true)
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sys.wait(100)
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;c64.restore_irq()
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; uword freq = 1181
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; cx16.vpoke(1, $f9c0, lsb(freq))
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; cx16.vpoke(1, $f9c1, msb(freq))
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; cx16.vpoke(1, $f9c2, %11111111) ; volume
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; cx16.vpoke(1, $f9c3, %11000000) ; triangle waveform
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}
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}
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irq {
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uword counter = 0
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sub irq() {
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counter++
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}
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}
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