Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!foxtail!phillips
From: phillips@foxtail.UUCP (Peter Phillips)
Newsgroups: comp.sys.amiga
Subject: Re: A rough future for the Amiga??? I think not.
Summary: C128 uses 3 processors at once.
Keywords: C128, 6502, Z80, 8502
Message-ID: <280@foxtail.UUCP>
Date: 12 Apr 90 19:07:55 GMT
References: <16192@snow-white.udel.EDU> <1990Apr8.013940.12984@wam.umd.edu> <10715@cbmvax.commodore.com> <1990Apr10.023937.8350@wam.umd.edu>
Reply-To: phillips@foxtail.UUCP (Peter Phillips)
Organization: The Foxtail Group, San Diego, CA
Lines: 19


In article <1990Apr10.023937.8350@wam.umd.edu> ddev@wam.umd.edu (Don DeVoe) writes:
>
>OK, in each of the above examples, I count only 1 additional processor which
>operates concurrently wrt i/o, and that meets the Apple ad's requirement:"two 
>additional processors...with the power of two additional personal computers." 
>After all, the Z80 in the C128 only runs under C/PM, during which time the 
>6510 does nothing wrt i/o, right?

When the C128D is operating in CP/M mode, the Z-80 runs most of the stuff, but
"The 8502 is responsible for most of the low-level I/O functions."
Quote from Commodore 128 Programmer's Refernece Guide, page 500, in a section
dealing with the interaction between the 8502, and the Z-80.

>Don DeVoe
>ddev@epsl.umd.edu

Peter Phillips
ucsd!foxtail!phillips