The XC designation normally was applied to pre-production and engineering
samples. The MC is what's on most of my early 68000's. I do believe that
1984-85 was when the 68HC000's became available, and THEY were certainly plastic
parts.
That was the timeframe during which they released their 'HC11's as well, and I
think that had to do with their HCMOS process. Once that was underway,
everything went to HCMOS, since it was a cheaper process.
Dick
----- Original Message -----
From: "Ethan Dicks" <erd_6502(a)yahoo.com>
To: <classiccmp(a)classiccmp.org>
Sent: Tuesday, August 28, 2001 11:38 AM
Subject: Re: Plastic or Ceramic?
--- Iggy Drougge <optimus(a)canit.se> wrote:
Adrian Vickers skrev:
OTOH, could any one confirm whether the 68000 was only available in
ceramics at first? The only non-plastic one I've seen was in a very old
system.
I have several pre-1980 MC68000 processors in ceramic. My former boss
has an XC68000 in ceramic (with a serial number engraved on the lid - #424)
I do not recall seeing plastic 68000s until after 1985.
It's not proof, but it's some points on the graph.
-ethan
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