This is a very hard to find BIOS update to allow the use of AMD K6-2 500 and 550mhz processor upgrades. Time Computers UK don't really have a sufficient website to support older machines, but still issue it at www.timesupport.com but it's not easy to find.
It worked for me and is easy to do - don't try it unless you have a MS5182 motherboard though - all at your own risk.
The following files are found inside the driver download file.
|amifl634.com||28.2 KB||19 Jul 1998|
|READ_ME.txt||2.0 KB||30 Dec 2002|
|A5182ams.152||262.1 KB||29 Dec 2002|