diff --git a/subsystems/ntvdm/bios.c b/subsystems/ntvdm/bios.c
index 36cebb27f52..ef3a0b11e7d 100644
--- a/subsystems/ntvdm/bios.c
+++ b/subsystems/ntvdm/bios.c
@@ -91,7 +91,7 @@ static VGA_REGISTERS VideoMode_320x200_4color =
     0x63,
 
     /* Sequencer Registers */
-    {0x00, 0x09, 0x00, 0x00, 0x02},
+    {0x00, 0x09, 0x03, 0x00, 0x02},
 
     /* CRTC Registers */
     {0x2D, 0x27, 0x28, 0x90, 0x2B, 0x80, 0xBF, 0x1F, 0x00, 0xC1, 0x00, 0x00,
@@ -99,7 +99,7 @@ static VGA_REGISTERS VideoMode_320x200_4color =
      0xFF},
 
     /* GC Registers */
-    {0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 0x0F, 0x0F, 0xFF},
+    {0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 0x0F, 0x0F, 0xFF},
 
     /* AC Registers */
     {0x00, 0x13, 0x15, 0x17, 0x02, 0x04, 0x06, 0x07, 0x10, 0x11, 0x12, 0x13,