Index: block-dmg.c
===================================================================
RCS file: /cvsroot/qemu/qemu/block-dmg.c,v
retrieving revision 1.2
diff -u -r1.2 block-dmg.c
--- block-dmg.c	3 Jan 2005 23:39:08 -0000	1.2
+++ block-dmg.c	12 Apr 2005 17:25:09 -0000
@@ -52,6 +52,16 @@
 static int dmg_probe(const uint8_t *buf, int buf_size, const char *filename)
 {
     int len=strlen(filename);
+
+    // Zlib CMF (4 bits CM, 4 bits flags)
+    if (((buf[0] & 0xf) == 8) && ((buf[0]&0xf0)<=7) &&
+	(len>4 && !strcmp(filename+len-4,".dmg")) )
+	return 50;
+
+    // Hopefully found Apple Partition map...
+    if ((buf[0] == 'E') && (buf[1] == 'R'))
+	return 0;
+
     if(len>4 && !strcmp(filename+len-4,".dmg"))
 	return 2;
     return 0;