From 63916a56b59d4f9a873c1a548d0bda5473f456b7 Mon Sep 17 00:00:00 2001
From: "H. Peter Anvin" <hpa@zytor.com>
Date: Sun, 31 May 2009 21:29:12 -0700
Subject: [PATCH] isolinux: can't clobber edx when dx contains the drive
 number...

Use ebx to hold the upper half of the partition offset, not edx.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
---
 core/isolinux.asm | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/core/isolinux.asm b/core/isolinux.asm
index 38d3d71..2627c2d 100644
--- a/core/isolinux.asm
+++ b/core/isolinux.asm
@@ -249,14 +249,14 @@ _start_hybrid:
 		pop di
 		pop es
 		xor eax,eax
-		xor edx,edx
+		xor ebx,ebx
 		cmp sp,7C00h
 		jae .nooffset
 		pop eax
-		pop edx
+		pop ebx
 .nooffset:
 		mov [cs:bsHidden],eax
-		mov [cs:bsHidden+4],edx
+		mov [cs:bsHidden+4],ebx
 
 		mov si,bios_cbios
 		jcxz _start_common
-- 
2.7.4