Fix SGX vpc register echo ( #168 )

pce-devel · Oct 14, 2024 · 1d9836f · 1d9836f
1 parent e11909f
commit 1d9836f
Showing 1 changed file with 17 additions and 10 deletions.
diff --git a/mednafen/src/pce/vce.cpp b/mednafen/src/pce/vce.cpp
@@ -831,17 +831,24 @@ uint8 VCE::ReadVDC(uint32 A)
 
   if(A & 0x8)
   {
-   ret = 0;
-
-   switch(A)
+   if (A & 0x10)
+   {
+    ret = 0xFF;
+   }
+   else
    {
-    case 0x8: ret = priority[0]; break;
-    case 0x9: ret = priority[1]; break;
-    case 0xA: ret = winwidths[0]; break;
-    case 0xB: ret = winwidths[0] >> 8; break;
-    case 0xC: ret = winwidths[1]; break;
-    case 0xD: ret = winwidths[1] >> 8; break;
-    case 0xE: ret = 0; break;
+    ret = 0;
+
+    switch(A)
+    {
+     case 0x8: ret = priority[0]; break;
+     case 0x9: ret = priority[1]; break;
+     case 0xA: ret = winwidths[0]; break;
+     case 0xB: ret = winwidths[0] >> 8; break;
+     case 0xC: ret = winwidths[1]; break;
+     case 0xD: ret = winwidths[1] >> 8; break;
+     case 0xE: ret = 0; break;
+    }
    }
   }
   else