Make sure global variables are zerod before exiting bios post.

diff --git a/src/post.c b/src/post.c
index 851dbaeeaaf4859d8f1879a082f2a736e9ccc740..216ed068e1e24daee5c397e94711f25e7033fffe 100644 (file)
--- a/src/post.c
+++ b/src/post.c
@@ -536,6 +536,10 @@ post()
     // XXX - original bios calls ata_detect before rom scan.
     rom_scan(0xc8000, 0xe0000);
 
+    // reset the memory (some boot loaders such as syslinux suppose
+    // that the memory is set to zero)
+    memset((void*)0x40000, 0, 0x40000); // XXX - shouldn't use globals
+
     callrom(SEG_BIOS, OFFSET_begin_boot);
 }