Attention 1802 fans...

From: Jim Kearney <jim_at_jkearney.com>
Date: Mon Sep 30 21:35:01 2002

>From: "Ben Franchuk" <bfranchuk_at_jetnet.ab.ca>
> Ross Archer wrote:
>
> > The 1802 was used in quite a number of Amateur radio ("ham")
> > satellites.
> > It was one of the first relatively "rad-hard" micros from
> > what I remember
> > reading, due in large part to its CMOS construction. I
> > guess those days
> > there were a few PMOS CPUs (8008, 8080) and a few NMOS CPUs
> > (Z80, 6502,
> > 9900JL), and exactly one CMOS CPU -- the CDP1802. So it was
> > 1802 or bust. :)
> The other CMOS chip at the time was the PDP-8 on a chip.
> The 1802 was I think was a special CMOS version that was
> latch up and rad-hardened. Several CPU's are rad-hard but
> the 1802 was the first cheap one.

It goes beyond that... there is a Silicon-On-Saphire version which is
considerably more rad-hard than a pure silicon process. In fact even more
recent space probes like Galileo (launched 1989) used 1802s.
Received on Mon Sep 30 2002 - 21:35:01 BST