24 lines
752 B
C
24 lines
752 B
C
// helloworld.c — minimal C64 program in C with Oscar64
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//
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// Builds a .prg that prints "Hello World" on the C64 text screen and exits.
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//
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// Build: ../scripts/build.sh
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// Run: x64 helloworld.prg (or use ../scripts/build.sh -e to run in
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// the built-in oscar64 emulator)
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#include <stdio.h>
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int main(void)
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{
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// CHR$(147) is PETSCII "clear screen" — same as printf("\f") in C but
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// emitted as the right byte for the C64's PETSCII character set.
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putchar(147);
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// The p"" prefix tells Oscar64 to emit the string as PETSCII, not ASCII.
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// Without it the C64's character ROM would render garbage because the
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// character generator maps 'H' to PETSCII 8, not ASCII 72.
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printf(p"Hello World\n");
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return 0;
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}
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