diff --git a/src/vid_nv_rivatnt.c b/src/vid_nv_rivatnt.c
index 47d52c410..115330fc0 100644
--- a/src/vid_nv_rivatnt.c
+++ b/src/vid_nv_rivatnt.c
@@ -1012,8 +1012,6 @@ static void rivatnt_out(uint16_t addr, uint8_t val, void *p)
   switch(svga->crtcreg)
   {
   case 0x1a:
-  //if(val & 2) svga->dac8bit = 1;
-  //else svga->dac8bit = 0;
   svga_recalctimings(svga);
   break;
   case 0x1e:
@@ -1219,6 +1217,13 @@ static void rivatnt_recalctimings(svga_t *svga)
     svga->render = svga_render_32bpp_highres;
     break;
   }
+
+  if((svga->crtc[0x28] & 3) != 0)
+  {
+    if(svga->crtc[0x1a] & 2) svga_set_ramdac_type(svga, RAMDAC_6BIT);
+    else svga_set_ramdac_type(svga, RAMDAC_8BIT);
+  }
+  else svga_set_ramdac_type(svga, RAMDAC_6BIT);
   
   if (((svga->miscout >> 2) & 2) == 2)
   {