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34 lines
647 B
Lua
34 lines
647 B
Lua
%import textio
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%zeropage dontuse
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; NOTE: meant to test to virtual machine output target (use -target vitual)
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main {
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%option align_word
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%option force_output
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sub start() {
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; a "pixelshader":
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void syscall1(8, 0) ; enable lo res creen
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ubyte shifter
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shifter >>= 1
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repeat {
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uword xx
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uword yy = 0
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repeat 240 {
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xx = 0
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repeat 320 {
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syscall3(10, xx, yy, xx*yy + shifter) ; plot pixel
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xx++
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}
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yy++
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}
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shifter+=4
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}
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}
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}
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