static void vga_get_cursor(unsigned int *x, unsigned int *y, unsigned int *en)
{
unsigned int addr;
addr = ((unsigned int) crtc_read(0x0E)) << 8;
addr += crtc_read(0x0F);
*x = addr % vga_video_console.columns;
*y = addr / vga_video_console.columns;
*en = !(crtc_read(0x0A) & (1 << 5));
}
uint8_t read_vga_register(register_set_t target, uint8_t index)
{
switch(target)
{
case GRAPHIC_CTRL:
return gctrl_read(index);
break;
case SEQUENCER:
return seq_read(index);
break;
case ATTRIBUTE_CTRL:
return attr_read(index);
break;
case CRT_CTRL:
return crtc_read(index);
break;
case EXTERNAL_REGISTERS:
switch(index)
{
case MISC_OUTPUT_REGISTER:
return misc_output_read();
break;
case FEATURE_CONTROL_REGISTER:
return feature_control_read();
break;
}
break;
default:
break;
}
return 0;
}
static void vga_enable_cursor(int state)
{
unsigned char tmp = crtc_read(0x0a);
if (state == 0)
tmp |= (1 << 5);
else
tmp &= ~(1 << 5);
crtc_write(tmp, 0x0a);
}
static void vga_init_cursor(void)
{
u8 val;
#define CURSOR_MSL 0x09 /* cursor maximum scan line */
#define CURSOR_START 0x0A /* cursor start */
#define CURSOR_END 0x0B /* cursor end */
val = crtc_read(CURSOR_MSL) & 0x1f;
crtc_write(0, CURSOR_START);
crtc_write(val - 2, CURSOR_END);
}
void init_tty32() {
curpos32 = (((uint16_t) crtc_read(CRTC_CURPOS_HI)) << 8) | ((uint16_t) crtc_read(CRTC_CURPOS_LO));
__asm__("1: incl %%edi; stosb; loop 1b" : : "a" (VGA_ATTRIBUTE), "c" (80 * VGA_LINES), "D" (video32));
put_status("");
}
