Sigma/Sigma is the oldest 386 chip that will run Linux - pre SS chips have
32bit maths faults.
> Linux 2.0.x will not run on it. I get NMI from it. But, Linux 1.2.13
> runs perfectly fine on it. Windows 3.1 dies on it.
The NMI is a ram fault. Changing the RAM speed and checking the socketing
of the components is probably the productive answer