1
0
mirror of https://github.com/sehugg/8bitworkshop.git synced 2024-12-23 03:29:39 +00:00
8bitworkshop/presets/coleco/skeleton.sdcc

84 lines
1.5 KiB
Plaintext

#include <stdlib.h>
#include <string.h>
#include "cv.h"
#include "cvu.h"
#define COLOR ((const cv_vmemp)0x2000)
#define IMAGE ((const cv_vmemp)0x1c00)
#define COLS 32
#define ROWS 24
typedef unsigned char byte;
typedef signed char sbyte;
typedef unsigned short word;
uintptr_t __at(0x6a) font_bitmap_a;
uintptr_t __at(0x6c) font_bitmap_0;
volatile bool vint;
volatile uint_fast8_t vint_counter;
void vint_handler(void)
{
vint = true;
vint_counter++;
}
void setup_32_column_font() {
cv_set_image_table(IMAGE);
cvu_memtovmemcpy(0x1800, (void *)(font_bitmap_0 - '0'*8), 256*8);
cv_set_character_pattern_t(0x1800);
cv_set_screen_mode(CV_SCREENMODE_STANDARD);
cv_set_color_table(COLOR);
cvu_vmemset(COLOR, 0x36, 8); // set color for chars 0-63
cvu_vmemset(COLOR+8, 0x06, 32-8); // set chars 63-255
}
char cursor_x;
char cursor_y;
void clrscr() {
cvu_vmemset(IMAGE, ' ', COLS*ROWS);
}
#define LOCHAR 0x0
#define HICHAR 0xff
#define CHAR(ch) (ch-LOCHAR)
byte getchar(byte x, byte y) {
return cvu_vinb(IMAGE + y*COLS + x);
}
void putchar(byte x, byte y, byte attr) {
cvu_voutb(attr, IMAGE + y*COLS + x);
}
void putstring(byte x, byte y, const char* string) {
while (*string) {
putchar(x++, y, CHAR(*string++));
}
}
void wait_vsync() {
vint = false;
while (!vint) ;
}
void delay(byte i) {
while (i--) {
wait_vsync();
}
}
void main() {
setup_32_column_font();
cv_set_screen_active(true);
cv_set_vint_handler(&vint_handler);
while(1);
}