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https://github.com/irmen/prog8.git
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55 lines
1.1 KiB
Lua
55 lines
1.1 KiB
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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ubyte global = 42
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sub start() {
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uword begin = c64.RDTIM16()
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ubyte shift
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repeat 60 {
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ubyte yy
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for yy in 0 to 59 {
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ubyte xx
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for xx in 0 to 79 {
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ubyte color = yy+xx+shift
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txt.setcc2(xx,yy,81,color) ; 356
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}
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}
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shift++
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}
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uword duration = c64.RDTIM16()-begin
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txt.print_uw(duration)
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txt.print(" \n")
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; a "pixelshader":
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; syscall1(8, 0) ; enable lo res creen
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; ubyte shifter
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;
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; shifter >>= 1
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;
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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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; txt.print_ub(shifter)
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; txt.nl()
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; }
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}
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}
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