Hi The datasheet is here http://www.datasheetarchive.com/preview/3656055.html if it is still this chip. It is 51 compatible core, so perhaps interactive disassembler should work. > Is there anyway to read the microcode on the uguru uC? Perhaps it comes somewhere in the BIOS image. It should be 40K firmware. > I noticed a W83320G PWM control chip on my mobo. Could this possibly control > the fans? Yes maybe. R.