mirror of
https://github.com/sehugg/8bitworkshop.git
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69 lines
868 B
C
69 lines
868 B
C
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#include <stdio.h>
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#ifdef __MAIN__
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void main(void);
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void startup(void) __naked {
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__asm
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jp _main
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__endasm;
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}
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#endif
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// http://www.users.globalnet.co.uk/~jg27paw4/pourri/rom-routines.txt
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void init_stdio(void) {
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__asm
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ld a,#2
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call 0x1601
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__endasm;
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}
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int putchar(int ch) {
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if (ch == 10) ch = 13; // newline -> CR
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__asm
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ld a,4 (ix)
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rst 0x10
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__endasm;
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}
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void beep(int divisor, int duration) {
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divisor;
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duration;
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__asm
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ld l,4 (ix)
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ld h,5 (ix)
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ld e,6 (ix)
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ld d,7 (ix)
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call 0x3b5
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__endasm;
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}
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int keyscan(void) {
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__asm
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call 0x028e
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ld l,e
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ld h,d
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__endasm;
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}
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#ifdef __MAIN__
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void main() {
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init_stdio();
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printf("HELLO WORLD!\r");
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beep(1000,20);
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beep(750,20);
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beep(500,20);
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while (1) {
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int key = keyscan();
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if (key != -1) printf("%04x", key);
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}
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while (1);
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}
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#endif
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