add link to i440fx data sheet.

Signed-off-by: Isaku Yamahata <yamah...@valinux.co.jp>
---
 hw/piix_pci.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/hw/piix_pci.c b/hw/piix_pci.c
index 384d31c..cd12212 100644
--- 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 {
-- 
1.6.5.4



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