#! /bin/sh /usr/share/dpatch/dpatch-run
## 14-a20-fix.dpatch by Colin Watson <cjwatson@ubuntu.com>
##
## All lines beginning with `## DP:' are a description of the patch.
## DP: Output a dummy command after enabling the A20 gate to stop USB
## DP: keyboards hanging. See also:
## DP: http://cvs.savannah.gnu.org/viewvc/grub/stage2/asm.S?root=grub&view=log#rev1.62

@DPATCH@
diff -urNad syslinux-3.53~/bcopy32.inc syslinux-3.53/bcopy32.inc
--- syslinux-3.53~/bcopy32.inc	2007-11-18 06:55:01.000000000 +0000
+++ syslinux-3.53/bcopy32.inc	2008-02-06 21:41:45.000000000 +0000
@@ -344,7 +344,11 @@
 ; A20 unmasked, proceed...
 ;
 a20_done_pop:	pop cx
-a20_done:	popad
+a20_done:	mov al,0FFh			; dummy command (USB hack)
+		out 064h, al
+		call empty_8042_uncond
+
+		popad
 		ret
 
 ;