path: root/flashrom.8
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authorVadim Girlin <>2013-08-24 12:18:17 +0000
committerStefan Tauner <>2013-08-24 12:18:17 +0000
commit4dd0f906c6ee620d16f2e87e56344a2cb0bf0a46 (patch)
treeaac06804cc25ac6df6fcd9c93c37671fede2bbd5 /flashrom.8
parentbdead0d27dc03c2f40b36d98dc94b717f38d56e7 (diff)
IT87: Add ability to select between chips on GIGABYTE DualBIOS boards
Thanks to Vadim Girlin for finding out how to do that. This is known to work on GA-MA770-UD3, GA-B75M-D3V, GA-B75N and GA-H61M-S1 (only M_BIOS is populated). Corresponding to flashrom svn r1720. Signed-off-by: Vadim Girlin <> Signed-off-by: Damien Zammit <> Signed-off-by: Stefan Tauner <> Tested-by: Damien Zammit <> Tested-by: Anton Kochkov <> Acked-by: Stefan Tauner <>
Diffstat (limited to 'flashrom.8')
1 files changed, 13 insertions, 0 deletions
diff --git a/flashrom.8 b/flashrom.8
index dccfd1a..c52542a 100644
--- a/flashrom.8
+++ b/flashrom.8
@@ -315,6 +315,19 @@ do not match, it will refuse to write the image unless you specify
.B ITE IT87 Super I/O
+If your mainboard is manufactured by GIGABYTE and supports DualBIOS it is very likely that it uses an
+ITE IT87 series Super I/O to switch between the two flash chips. Only one of them can be accessed at a time
+and you can manually select which one to use with the
+.B " flashrom \-p internal:dualbiosindex=chip"
+syntax where
+.B chip
+is the index of the chip to use (0 = main, 1 = backup). You can check which one is currently selected by
+leaving out the
+.B chip
If your mainboard uses an ITE IT87 series Super I/O for LPC<->SPI flash bus
translation, flashrom should autodetect that configuration. If you want to
set the I/O base port of the IT87 series SPI controller manually instead of
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