MC68K (was Re: Apple 1)

From: Ethan Dicks <erd_at_infinet.com>
Date: Sun Dec 27 21:21:53 1998

> were executed. We had 32K of 2114 1Kx4 SRAMs. Our board performed oddly,
> <but it still worked. AFAIK, all MC68000 chips work to spec.
>
> There were many mask revisions early on to correct microcode bugs.
> Apparently the microcode was either difficult or very complex contributing
> to many errors.

We had a batch of Synertek CPUs that turned out to have a flaw in the mask
that lead to spotty thinness in some of the features on the chip. Synertek
tols us that we were nuts about our failure rate, but in the end, they showed
us the photomicrograms of a failed chip with a full report. I have that
somewhere in a folder.
 
> <Anyone want to buy a vintage 1982, gold and ceramic Motorola MC68000? Mak
> <offer. Not available in stores. Not found on eBay.
>
> I have two. ;)

I have considerably more than two. Tubes.

-ethan
 
Received on Sun Dec 27 1998 - 21:21:53 GMT