I did the mods today to set the FSB to 100MHz etc, and installed a K6-3+ 400MHz CPU. I found out afterwards that this won't POST above 300MHz (but will at either 66 x 4.5 or 100 x 3). Utilities like k6clk.exe won't run on XP because they use privileged instructions.
Does anyone know of any way of getting the multiplier up after POST? One possibility I thought of was tweaking a boot loader such as GRUB; another possibility might be a Window VxD. It would be great if something already existed and I didn't have to try writing it myself.
Assuming I do have to write it myself, is there source available for a program such as k6clk.exe that I can use as a reference?