My parents' computer recently died, and I'm going to be upgrading it for them. The processor is a 200 MHz AMD, and I can't find a name on the motherboard. I want to re-use the case if I can, but I don't think it's an ATX formfactor. My question is how can I tell? There's not really a backplate, just holes in the case itself for plugs on the motherboard to fit through. Also, this motherboard only takes a pre-PS2 type keyboard. Is this pre-ATX, or just microATX or something else I'm not familiar with? Thanks