Newsgroups: comp.robotics
Path: cantaloupe.srv.cs.cmu.edu!rochester!udel!news.mathworks.com!uunet!in1.uu.net!nwnexus!nwnexus!amc-gw!minos!jon
From: jon@minos.uucp (Jon Mandrell)
Subject: Re: Best microprocessor
Message-ID: <1995Feb25.041638.2276@minos.uucp>
Organization: I have no Organization
References: <3id31v$abl@acorn.acorn.co.uk> <D4DGFx.Ist@erie.ge.com>
Date: Sat, 25 Feb 1995 04:16:38 GMT
Lines: 17

In article <D4DGFx.Ist@erie.ge.com> huang@erie.ge.com writes:
>I think the Z-80 is opcode-compatible with the i8085.  It's more correctly 
>described as a derivative of the i8085 rather than the i8080.
Nope, it's a superset of the 8080.  The 8085 has the RIM and SIM instructions
that the 8080 and z80 don't support.  

                8080
                 /\
                /  \
              Z80  8085

A Z-80 will run any 8080 program, and an 8085 will run any 8080 program,
but an 8080 can't necessarily run a z80 or 8085 program.

-- 
Jon Mandrell, from my home system (jon@minos.UUCP)

