Read how Andreas Mohr was able to get 200MHz, see this message from Usenet:
From: Andreas Mohr (email@example.com)
Subject: Re: Q: IDT WinChip2 and Linux ?
Newsgroups: comp.os.linux.hardware, comp.os.linux.misc
I'm using an IDT C6/225 as 200 MHz on an Acernote Light
350-PC(one month without _any_ problem).And it's fast as hell compared to the old P75 :)I have been compiling several dev kernels and Wines without sig11.The only problem left is the battery:only about half of the
uptime I used to have :(But considered that this is more than double speed, it's a pretty normaleffect.
I tried contacting him but it seems his email is dead.