27 lines
745 B
Forth
27 lines
745 B
Forth
# Checking the timer.
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#
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# To build a disk image:
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# ./translate apps/ex12.mu # emits code.img
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# To run:
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# qemu-system-i386 code.img
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#
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# Expected output: text with slowly updating colors
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fn main screen: (addr screen), keyboard: (addr keyboard), data-disk: (addr disk) {
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var fg/ecx: int <- copy 0
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var prev-timer-counter/edx: int <- copy 0
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{
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var dummy/eax: int <- draw-text-rightward screen, "hello from baremetal Mu!", 0x10/x, 0x400/xmax, 0x10/y, fg, 0/bg
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# wait for timer to bump
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{
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var curr-timer-counter/eax: int <- timer-counter
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compare curr-timer-counter, prev-timer-counter
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loop-if-=
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prev-timer-counter <- copy curr-timer-counter
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}
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# switch color
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fg <- increment
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loop
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}
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}
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