- improved VGA compatible setup for VBE modes (disable CGA and Hercules

  compatible memory layout)

1 files changed, 6 insertions, 0 deletions

diff --git a/vbe.c b/vbe.c
index 801c675..cab6c79 100644
--- a/vbe.c
+++ b/vbe.c
@@ -574,6 +574,12 @@ bit9_clear:
   mov  dx, # VGAREG_VGA_CRTC_ADDRESS
   mov  ax, #0x0009
   out  dx, ax
+  mov  al, #0x17
+  out  dx, al
+  mov  dx, # VGAREG_VGA_CRTC_DATA
+  in   al, dx
+  or   al, #0x03
+  out  dx, al
   mov  dx, # VGAREG_ACTL_RESET
   in   al, dx
   mov  dx, # VGAREG_ACTL_ADDRESS