Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!lll-winken!iggy.GW.Vitalink.COM!widener!netnews.upenn.edu!gradient.cis.upenn.edu!touch
From: touch@gradient.cis.upenn.edu (Joseph D. Touch)
Newsgroups: sci.electronics
Subject: Re: microprocessor wanted
Message-ID: <41913@netnews.upenn.edu>
Date: 24 Apr 91 19:37:51 GMT
References: <119279@unix.cis.pitt.edu> <1991Apr24.154831.9757@zoo.toronto.edu> <1991Apr24.174217.14901@cbnewsj.att.com>
Sender: news@netnews.upenn.edu
Reply-To: touch@gradient.cis.upenn.edu (Joseph D. Touch)
Organization: University of Pennsylvania
Lines: 25
Nntp-Posting-Host: gradient.cis.upenn.edu

In article <1991Apr24.174217.14901@cbnewsj.att.com> asd@cbnewsj.att.com (Adam S. Denton) writes:
>>In article <119279@unix.cis.pitt.edu> fmgst@unix.cis.pitt.edu (Filip Gieszczykiewicz) writes:
>>>	o	BUILT-IN floating processor (that's the problem)
>>>	o	CHEAP (under $40)
>
>get by with two chips.  Motorola used to make
>a "floating point ROM" - I believe MC6839 - which interfaced with
>the 6800 family.  Basically, it was floating point emulation in
>ROM, already coded and debugged for you.  You can get the source

I have one of these ROMs, and the manual.  In fact, it's in a socket
on a 'board' to fit in the slot of a Radio Shack Color Computer (which
uses a 6809 - the ROM is based on a 6809 microprocessor).

I will sell the ROM & manual, and the COCO (first model, 64K,
with disk drive, joystics) for that matter (you can cannibalize 
it for the 6809, a dynamic memory controller 6883, a video chip, 
etc..)

Send me an offer.

Joe Touch
Dept of Computer and Information Science
University of Pennsylvania
touch@cis.upenn.edu