piix_pci: add link to i440fx data sheet.

add link to i440fx data sheet.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

diff --git a/hw/piix_pci.c b/hw/piix_pci.c
index 384d31c0eaee65d1c126fa6c67a8e05e96e3ac4f..cd12212fffe252deaaa0aa7d4a3cc7c65def2f61 100644 (file)
--- a/hw/piix_pci.c
+++ b/hw/piix_pci.c
@@ -29,6 +29,11 @@
 #include "isa.h"
 #include "sysbus.h"
 
+/*
+ * I440FX chipset data sheet.
+ * http://download.intel.com/design/chipsets/datashts/29054901.pdf
+ */
+
 typedef PCIHostState I440FXState;
 
 typedef struct PIIX3State {