The motherboard bios modules provided by SiliconImage can be modified for inclusion as a module in your RS480/RS482 motherboard bios with just a few changes.

Note: my experiments show that versions before 3112 / 3112a / 3512 4.2.50 have a slightly different interface into the main bios, e.g. selections for Sata IDE/Raid are controlled by different bios variables and are not compatible with versions 4.2.50 and above. I have done the following type of mods to 4.2.50 and the latest 4.2.76. When the 4.2.49 bios is modded, it will not work correctly integrated with a bios that works with 4.2.50 and 4.2.76.

So if your current raid bios module version is 4.2.49 or earlier, talk with your mobo vendor on getting a newer bios.

To modify the SiI3112A bios supplied by SiliconImage and adapt it to the RS480/RS482 motherboard bios, change the following:

4276.bin

Offset old new

3E 95 02 PCI ID

3F 10 10

40 12 79

41 31 43

The PNP enumeration table in the BIOS

1219 95 B8 Checksum for this row

121A 95 02 PCI ID

121B 10 10

121C 12 79

121D 31 43

1239 95 B8 Checksum for this row

123A 95 02 PCI ID

123B 10 10

123C 12 79

123D 31 43

1259 95 B8 Checksum for this row

125A 95 02 PCI ID

125B 10 10

125C 12 79

125D 31 43

1279 95 B8 Checksum for this row

127A 95 02 PCI ID

127B 10 10

127C 12 79

127D 31 43

To force Raid mode:

127D 75 90 Change a 'JNZ' to NOP's after a check for 6112 from PCI

127e 0A 90 register “Subsytem ID” (offset 2AH)

Checksum for file:

A7FF CE 43 This checksum applies

ONLY if force raid also

done