diff --git a/util/sis/Makefile b/util/sis/Makefile
index de62f052b7..0d9712b083 100644
--- a/util/sis/Makefile
+++ b/util/sis/Makefile
@@ -4,5 +4,8 @@ CC = gcc -O2
 all: ${OBJS}
 	${CC} -o flash_rom flash_rom.c ${OBJS}
 	${CC} -o flash_on flash_on.c
+	${CC} -o acpi_reset acpi_reset.c
+	${CC} -o acpi_shutdown acpi_shutdown.c
+
 clean:
-	rm -f flash_rom flash_on *.o *~
\ No newline at end of file
+	rm -f flash_rom flash_on acpi_reset acpi_shutdown *.o *~
\ No newline at end of file
diff --git a/util/sis/acpi_reset.c b/util/sis/acpi_reset.c
new file mode 100644
index 0000000000..cf1382dc94
--- /dev/null
+++ b/util/sis/acpi_reset.c
@@ -0,0 +1,64 @@
+/*
+ * acpi_reset.c: Reboot your LinuxBIOS system with ACPI software watchdo
+ *
+ *
+ * Copyright 2000 Silicon Integrated System Corporation
+ *
+ *	This program is free software; you can redistribute it and/or modify
+ *	it under the terms of the GNU General Public License as published by
+ *	the Free Software Foundation; either version 2 of the License, or
+ *	(at your option) any later version.
+ *
+ *	This program is distributed in the hope that it will be useful,
+ *	but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *	GNU General Public License for more details.
+ *
+ *	You should have received a copy of the GNU General Public License
+ *	along with this program; if not, write to the Free Software
+ *	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *
+ * Reference:
+ *	1. SiS 630 Specification
+ *
+ * $Id$
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/mman.h>
+#include <sys/io.h>
+#include <unistd.h>
+#include <stdio.h>
+
+main()
+{
+	unsigned char b;
+	unsigned short w;
+	unsigned short acpi_base;
+
+	/* get io privilege access PCI configuration space */
+	if (iopl(3) != 0) {
+		perror("Can not set io priviliage");
+		exit(1);
+	}
+
+	/* Enable ACPI by set B7 on Reg 0x40, LPC */
+	outl(0x80000840, 0x0cf8);
+	b = inb(0x0cfc) | 0x80;
+	outb(b, 0xcfc);
+
+	/* get the ACPI base address for register 0x74,0x75 of LPC */
+	outl(0x80000874, 0x0cf8);
+	w = inw(0x0cfc);
+	acpi_base = w;
+
+	printf ("acpi base: %x\n", acpi_base);
+
+	/* Set software watchdog timer init value */	
+	outb(0x03, 0x4a + acpi_base);
+	
+	/* Software watchdog enable, issue PCIRST# when time expire */
+	outb(0x8f, 0x4b + acpi_base);
+}
diff --git a/util/sis/acpi_shutdown.c b/util/sis/acpi_shutdown.c
new file mode 100644
index 0000000000..90e5c09911
--- /dev/null
+++ b/util/sis/acpi_shutdown.c
@@ -0,0 +1,65 @@
+/*
+ * acpi_shutdown.c: Shutdown your LinuxBIOS system by switch to ACPI S5 state
+ *
+ *
+ * Copyright 2000 Silicon Integrated System Corporation
+ *
+ *	This program is free software; you can redistribute it and/or modify
+ *	it under the terms of the GNU General Public License as published by
+ *	the Free Software Foundation; either version 2 of the License, or
+ *	(at your option) any later version.
+ *
+ *	This program is distributed in the hope that it will be useful,
+ *	but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *	GNU General Public License for more details.
+ *
+ *	You should have received a copy of the GNU General Public License
+ *	along with this program; if not, write to the Free Software
+ *	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *
+ * Reference:
+ *	1. SiS 630 Specification
+ *
+ * $Id$
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/mman.h>
+#include <sys/io.h>
+#include <unistd.h>
+#include <stdio.h>
+
+main()
+{
+	unsigned char b;
+	unsigned short w;
+	unsigned short acpi_base;
+
+	/* get io privilege access PCI configuration space */
+	if (iopl(3) != 0) {
+		perror("Can not set io priviliage");
+		exit(1);
+	}
+
+	/* Enable ACPI by set B7 on Reg 0x40, LPC */
+	outl(0x80000840, 0x0cf8);
+	b = inb(0x0cfc) | 0x80;
+	outb(b, 0xcfc);
+
+	/* get the ACPI base address for register 0x74,0x75 of LPC */
+	outl(0x80000874, 0x0cf8);
+	w = inw(0x0cfc);
+	acpi_base = w;
+
+	printf ("acpi base: %x\n", acpi_base);
+	
+	/* ACPI Register 5, Bit 10-12, Sleeping Type,
+	   set to 101 -> S5, soft_off */
+	outb(0x14, 0x05 + acpi_base);
+
+	/* ACPI Register 5, Bit 13, Sleep Enable */
+	outb(0x20 | 0x14, 0x05 + acpi_base);
+}