I can't found a newer bios, the following is come from the output of dmidecode:

# dmidecode 2.9
SMBIOS 2.3 present.
23 structures occupying 1483 bytes.
Table at 0x000E4BE0.

Handle 0x0000, DMI type 0, 24 bytes
BIOS Information
Vendor: INSYDE
Version: R1.04
Release Date: 10/04/2006
ROM Size: 1024 kB
Characteristics:
PCI is supported
BIOS is upgradeable
BIOS shadowing is allowed
Boot from CD is supported
Selectable boot is supported
BIOS ROM is socketed
......
System Information
Manufacturer: MTC
Product Name: MTC
Version: 1
Serial Number: 123456789
UUID: AA55AA55-AA55-AA55-55AA-55AA55AA55AA
Wake-up Type: Power Switch

Handle 0x0002, DMI type 2, 16 bytes
Base Board Information
Manufacturer: MTC
Product Name: MTC
Version: Base Board Version
Serial Number: Base Board Serial Number
Asset Tag: Base Board Asset Tag
Features:
Board is a hosting board
Board is replaceable
......