> That's correct, Michael and Matthew. I'm trying to enable the G3 upgrade card 
> in the L2 cache slot. The original (and soldered on) 250MHz 603e works just 
> fine. I realize that these cards are a major hack, and it may not be possible 
> to get it to work, but it'd be nice to have the slightly faster machine if 
> there's a way to do it.

There's a problem, I think. All of the L2 cache slot CPU accelerators were 
automatic, since they cause the native processor to float. No accelerators 
that I know about boot using one CPU, then switch somehow to another - 
that'd be a complicated mess of code to rearrange the MMU tables and stuff 
like that after the OS has booted and all of that.

So make sure your L2 accelerator is seated firmly, with nothing blocking 
the socket, and see if it makes a difference. If it doesn't, you might 
have a defective accelerator or motherboard.

John