mirror of
https://github.com/sehugg/8bitworkshop.git
synced 2024-12-25 00:31:04 +00:00
45 lines
884 B
C
45 lines
884 B
C
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#include <stdlib.h>
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#include <string.h>
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#include <cv.h>
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#include <cvu.h>
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#define DEFINE_BIOS_FN(name,address) \
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int name() { __asm call address __endasm; }
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DEFINE_BIOS_FN(cvbios_skill_screen, 0x1f7c)
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//DEFINE_BIOS_FN(cvbios_read_ctl, 0x1f79)
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int cvbios_read_left_joystick() {
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__asm
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ld hl,#0x0000
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jp 0x1f79
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__endasm;
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}
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int cvbios_read_right_joystick() {
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__asm
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ld hl,#0x0100
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jp 0x1f79
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__endasm;
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}
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const char* const HEX = "0123456789ABCDEF";
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void main() {
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// load BIOS-friendly stack address
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__asm
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ld sp,#0x73b9
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__endasm;
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// call BIOS
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cvbios_skill_screen();
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// loop and read joystick
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do {
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int ctl = cvbios_read_left_joystick();
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cvu_voutb(HEX[(ctl>>0)&0xf], 0x1800 + 3);
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cvu_voutb(HEX[(ctl>>4)&0xf], 0x1800 + 2);
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cvu_voutb(HEX[(ctl>>8)&0xf], 0x1800 + 1);
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cvu_voutb(HEX[(ctl>>12)&0xf], 0x1800 + 0);
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} while(1) ;
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}
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