reset rombios32 area

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2403 c046a42c-6fe2-441c-8c8c-71466251a162

pc-bios/bios.diff

@@ -1,10 +1,32 @@
+Index: rombios.c
+===================================================================
+RCS file: /cvsroot/bochs/bochs/bios/rombios.c,v
+retrieving revision 1.174
+diff -u -w -r1.174 rombios.c
+--- rombios.c	17 Oct 2006 16:48:05 -0000	1.174
++++ rombios.c	8 Feb 2007 21:57:48 -0000
+@@ -9472,6 +9472,14 @@
+   mov eax, #0x00040000
+   call eax
+ 
++  ;; reset the memory (some boot loaders such as syslinux suppose 
++  ;; that the memory is set to zero)
++  mov edi, #0x00040000
++  mov ecx, #0x40000 / 4
++  xor eax, eax
++  rep 
++    stosd
++
+   ;; return to 16 bit protected mode first
+   db 0xea
+   dd rombios32_10
 Index: rombios.h
 ===================================================================
 RCS file: /cvsroot/bochs/bochs/bios/rombios.h,v
 retrieving revision 1.3
 diff -u -w -r1.3 rombios.h
 --- rombios.h	3 Oct 2006 20:27:30 -0000	1.3
-+++ rombios.h	1 Nov 2006 19:16:34 -0000
++++ rombios.h	8 Feb 2007 21:57:48 -0000
 @@ -19,7 +19,7 @@
  //  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
  
@@ -20,7 +42,7 @@ RCS file: /cvsroot/bochs/bochs/bios/rombios32.c,v
 retrieving revision 1.8
 diff -u -w -r1.8 rombios32.c
 --- rombios32.c	3 Oct 2006 20:27:30 -0000	1.8
-+++ rombios32.c	1 Nov 2006 19:16:34 -0000
++++ rombios32.c	8 Feb 2007 21:57:48 -0000
 @@ -852,6 +852,11 @@
      int ioapic_id, i, len;
      int mp_config_table_size;