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Path: utzoo!linus!philabs!seismo!rlgvax!cvl!umcp-cs!chris
From: chris@umcp-cs.UUCP
Newsgroups: net.arch
Subject: Re: uP architecture - (nf)
Message-ID: <416@umcp-cs.UUCP>
Date: Sat, 2-Jul-83 16:16:24 EDT
Article-I.D.: umcp-cs.416
Posted: Sat Jul  2 16:16:24 1983
Date-Received: Sun, 3-Jul-83 04:28:21 EDT
References: <189@ucbcad.UUCP>
Organization: Univ. of Maryland, Computer Science Dept.
Lines: 25


	From: ucbesvax.turner@ucbcad.UUCP

	Finally, has anyone heard of the 1802, which I have been told
is a very slow but architecturally elegant CMOS uP?

Yes!  The 1802 is kinda neat.  Also, it's not slow.  For most
applications it's faster than a Z80 (especially if you buy the 10 MHz
(!) version) [don't quote me on this, I've never done a timing
comparison].  And the CMOS is nice too, very low power, no heating, etc
etc.  The OSCAR sats use(d?) 1802s, and I think the Venus probes did
also.

The world's shortest loop:

	20		# decrement PC!

The 1802 is the only uP I know of with GHI (Get High) (8x I think)
and SEX (Ex I think) instructions.  (Seriously!)

					- Chris
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