Perhaps you haven't set your EDITOR environment variable correctly?
> Can someone explain to me the difference between a normal 486dx/dx2/sx
> and the intel overdrive 486dx/dx2/sx.
> I have read all the blurbs at Hardly Normal and other stores but can't
> for the life of me work it out. It plugs into the CPU socket, replacing
> the CPU, but it seems to just be a new CPU, nothing more.
> If anyone can solve this mystery for me I'll be grateful (and able to
> sleep again :-)
In fact, all DX/2s are overdrives. I long ago lost track of all of them
(there are approximately 15-20 different overdrive chips across the
486 range!), but certainly for the DX/2s, there is an ODR and an ODP
version. I've forgotten which is which, but one is intended as a drop
in replacement for SX/DX chips, the other is intended to drop into a
secondary CPU socket and in doing so disable an existing processor. Such
arrangements are required, for example, on 486sx boards where the
original CPU is surface mounted, or on 386/486 boards. If you get a
chip, it will either work or not work on your board. If it does not,
you got the wrong one...