Hi Aitch,
no it was hardwiring and cutting traces, and putting in a new processor (mmc type, actually comes on a small circuit board) as well as a bios mod.
There is a huge and (for someone like me) fascinating thread on this at the Wim's Bios website:
http://www.wimsbios.com/phpBB2/topic4046.html
The highest speed a TP600 would go before was 400mhz with a Pent II.
With this hack you can add a Pent III and overclock up to 1 ghz if you can find one of the 800 mhz PIIIs. The TP600 will also take 544 megabytes of ram if you find the right modules.
The TP600E is a really nice package -- small, very solid, and the keyboard is tops, even amongst other TPs. (I now have a T30) They can be found in good shape for $75 these days if you look for awhile.
I was running full Ubuntu, with VMWare Player of my former Win98 installation running under Ubuntu. Also played DVD movies in VLC with no jitter. Naturally Puppy left Ubuntu in the dust on that machine as well.
Sorry to OT so much. But to move back towards it, With a hopped up TP600, running Puppy and an emulator like VMWare Player, you can run most everything you need under Puppy, and where there is no substitute for some Win program, run it in Puppy in a VM window.
The only thing that won't run fast enough in VM at sub-gigaherz machines is games.
Right now I'm trying to get VMWare going in Puppy4.11 on the T30. Having trouble because of the newer kernel (another thread on this.)
If I can get VM Player going in 411 , I'll write a how-to for moving an existing Windows 98 installation into a virtual machine to run on Puppy.
Mind you, that's an existing installation -- with all programs intact, not a new installation on an empty VM. You don't do any new installs -- it keeps your settings, programs data and, presumably, licenses intact. You don't have to dual boot anymore -- just run an image of your old win partition in VM in Puppy. I did this in Ubuntu, and I'm pretty sure I can here, too.
Just have to get VMWare going,