From 9d06a14bae10afc48dbfd6d2661da254e196e563 Mon Sep 17 00:00:00 2001
From: Maarten Bosma <maarten@bosma.de>
Date: Wed, 3 Jan 2007 14:33:41 +0000
Subject: [PATCH] Do not show "Press any key to boot from CD"-Message if there
 is no MBR on the hard drive.

svn path=/trunk/; revision=25283
---
 reactos/boot/freeldr/bootsect/isoboot.asm | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/reactos/boot/freeldr/bootsect/isoboot.asm b/reactos/boot/freeldr/bootsect/isoboot.asm
index d0806901cdf..b2e211be2f0 100644
--- a/reactos/boot/freeldr/bootsect/isoboot.asm
+++ b/reactos/boot/freeldr/bootsect/isoboot.asm
@@ -139,13 +139,21 @@ relocate:
 	jmp	.kbd_buffer_test
 .kbd_buffer_empty:
 
-	; Check if there is harddisk
+	; Check for MBR on harddisk
 	pusha
-	mov	ax, 0800h
+	mov	ax, 0201h
 	mov	dx, 0080h
+	mov	cx, 0001h
+	mov	bx, trackbuf
 	int	13h
 	popa
-	jc	.boot_cdrom
+	jc	.boot_cdrom ; could not read hdd
+
+	push ax
+	mov ax, word [trackbuf]
+	cmp ax, 0
+	je	.boot_cdrom ; no boot sector found (hopefully there are no weird bootsectors which begin with 0)
+	pop ax
 
 	; Display the 'Press key' message and wait for a maximum of 5 seconds
 	call	crlf