void cga_write(char const* str) {
int16_t* vram_current = CALC_LOCATION;
while(str && *str) {
if(*str != '\n' && *str != '\r') {
switch(*str) {
case '\t': {
uint16_t x = ALIGN_UP(__cga_x + 1, 8) - __cga_x;
__cga_x += x;
while(x--) {
*vram_current++ = ' ' | __cga_attr;
}
vram_current = CALC_LOCATION - 1;
break;
}
case '\b':
if(__cga_x > 0)
--__cga_x;
vram_current = CALC_LOCATION;
*vram_current = ' ' | __cga_attr;
break;
default:
*vram_current = *str | __cga_attr;
++__cga_x;
break;
}
}
if(__cga_x >= CGA_WIDTH || *str == '\n' || *str == '\r') {
__cga_x = 0;
if(*str != '\r') {
++__cga_y;
vram_current = CALC_LOCATION - 1;
}
}
if(__cga_y >= CGA_HEIGHT) {
scroll1();
__cga_y = CGA_HEIGHT - 1;
vram_current = CALC_LOCATION - 1;
}
++str;
++vram_current;
}
}
int
Scroll(void *v)
{
return scroll1(v, 1);
}
/*
* Scroll to the next/previous screen
*/
int
scroll(void *v)
{
return scroll1(v, 0);
}
