From 904d75079f741dfed5f0d616e60bd33f047aeb99 Mon Sep 17 00:00:00 2001
From: OBattler <oubattler@gmail.com>
Date: Sat, 8 Oct 2016 03:15:04 +0200
Subject: [PATCH] Attempt to fix Riva TNT RAMDAC type setting.

---
 src/vid_nv_rivatnt.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/vid_nv_rivatnt.c b/src/vid_nv_rivatnt.c
index a31b679c9..298b4d1fe 100644
--- a/src/vid_nv_rivatnt.c
+++ b/src/vid_nv_rivatnt.c
@@ -1012,6 +1012,15 @@ static void rivatnt_out(uint16_t addr, uint8_t val, void *p)
   switch(svga->crtcreg)
   {
   case 0x1a:
+#if 0
+  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);
+#endif
+  svga_set_ramdac_type(svga, (val & 2) ? RAMDAC_6BIT : RAMDAC_8BIT);
   svga_recalctimings(svga);
   break;
   case 0x1e:
@@ -1279,12 +1288,16 @@ static void rivatnt_recalctimings(svga_t *svga)
     break;
   }
 
+#if 0
   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);
+#endif
+
+  svga_set_ramdac_type(svga, (svga->crtc[0x1a] & 2) ? RAMDAC_6BIT : RAMDAC_8BIT);
   
   if (((svga->miscout >> 2) & 2) == 2)
   {