diff -urN gpxe-0.9.7/src/config/general.h gpxe-0.9.7-hdboot/src/config/general.h
--- gpxe-0.9.7/src/config/general.h	2009-07-20 09:44:50.000000000 -0400
+++ gpxe-0.9.7-hdboot/src/config/general.h	2009-07-20 09:45:33.000000000 -0400
@@ -100,6 +100,7 @@
 #define IMAGE_CMD		/* Image management commands */
 #define DHCP_CMD		/* DHCP management commands */
 #define SANBOOT_CMD		/* SAN boot commands */
+#define HDBOOT_CMD		/* SAN boot commands */
 #undef LOGIN_CMD		/* Login command */
 
 /*
diff -urN gpxe-0.9.7/src/core/config.c gpxe-0.9.7-hdboot/src/core/config.c
--- gpxe-0.9.7/src/core/config.c	2009-03-01 21:23:42.000000000 -0500
+++ gpxe-0.9.7-hdboot/src/core/config.c	2009-07-20 09:45:56.000000000 -0400
@@ -193,6 +193,9 @@
 #ifdef SANBOOT_CMD
 REQUIRE_OBJECT ( sanboot_cmd );
 #endif
+#ifdef HDBOOT_CMD
+REQUIRE_OBJECT ( hdboot_cmd );
+#endif
 #ifdef LOGIN_CMD
 REQUIRE_OBJECT ( login_cmd );
 #endif
diff -urN gpxe-0.9.7/src/hci/commands/hdboot_cmd.c gpxe-0.9.7-hdboot/src/hci/commands/hdboot_cmd.c
--- gpxe-0.9.7/src/hci/commands/hdboot_cmd.c	1969-12-31 19:00:00.000000000 -0500
+++ gpxe-0.9.7-hdboot/src/hci/commands/hdboot_cmd.c	2009-07-20 09:46:25.000000000 -0400
@@ -0,0 +1,32 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <getopt.h>
+#include <int13.h>
+#include <gpxe/command.h>
+#include <usr/autoboot.h>
+
+/**
+ * The "hdboot" command
+ *
+ * @v argc		Argument count
+ * @v argv		Argument list
+ * @ret rc		Exit code
+ */
+static int hdboot_exec ( int argc, char **argv ) {
+	if (argc != 1) {
+		printf ( "Usage:\n"
+		 "  %s\n"
+		 "\n"
+		 "Boot from the first HD\n",
+		 argv[0] );
+		return 1;
+	}
+        int13_boot ( 0x80 );
+	return 1;
+}
+
+struct command hdboot_command __command = {
+	.name = "hdboot",
+	.exec = hdboot_exec,
+};