Emulators of Classic Computers

From: Tony Duell <ard_at_p850ug1.demon.co.uk>
Date: Thu Jan 15 16:50:18 2004

> >
> >Not if the uCode proms have rotted.
> >
> >
> >
> >
> I thought 2900 designs usually used fuse link proms as the eproms of the
> era weren't fast enough.

They do. But fusible link proms can also fail -- any IC can fail (if ICs
other than EPROMs lasted for ever, we'd not be having this discussion
:-)). In fact, I read somewhere that the PROMs can suffer from bit-rot
where the fuses actually grow back. And of course the transistors, etc,
in the address decoder and output buffers can fail.

-tony
Received on Thu Jan 15 2004 - 16:50:18 GMT