/*Trident TKD8001 RAMDAC emulation*/
#include "ibm.h"
#include "mem.h"
#include "video.h"
#include "vid_svga.h"
#include "vid_tkd8001_ramdac.h"

void tkd8001_ramdac_out(uint16_t addr, uint8_t val, tkd8001_ramdac_t *ramdac, svga_t *svga) {
        //        pclog("OUT RAMDAC %04X %02X %04X:%04X\n",addr,val,CS,pc);
        switch (addr) {
        case 0x3C6:
                if (ramdac->state == 4) {
                        ramdac->state = 0;
                        ramdac->ctrl = val;
                        switch (val >> 5) {
                        case 0:
                        case 1:
                        case 2:
                        case 3:
                                svga->bpp = 8;
                                break;
                        case 5:
                                svga->bpp = 15;
                                break;
                        case 6:
                                svga->bpp = 24;
                                break;
                        case 7:
                                svga->bpp = 16;
                                break;
                        }
                        return;
                }
                // tkd8001_state = 0;
                break;
        case 0x3C7:
        case 0x3C8:
        case 0x3C9:
                ramdac->state = 0;
                break;
        }
        svga_out(addr, val, svga);
}

uint8_t tkd8001_ramdac_in(uint16_t addr, tkd8001_ramdac_t *ramdac, svga_t *svga) {
        //        pclog("IN RAMDAC %04X %04X:%04X\n",addr,CS,pc);
        switch (addr) {
        case 0x3C6:
                if (ramdac->state == 4) {
                        // tkd8001_state = 0;
                        return ramdac->ctrl;
                }
                ramdac->state++;
                break;
        case 0x3C7:
        case 0x3C8:
        case 0x3C9:
                ramdac->state = 0;
                break;
        }
        return svga_in(addr, svga);
}
