Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!amdcad!sun!pitstop!sundc!seismo!uunet!portal!cup.portal.com!A-N-Onymouse
From: A-N-Onymouse@cup.portal.com (John - DeBert)
Newsgroups: comp.sys.cbm
Subject: Re: Zmodem on commodores?
Message-ID: <14311@cup.portal.com>
Date: 4 Feb 89 21:28:48 GMT
References: <10978@s.ms.uky.edu> <14095@cup.portal.com> <683@csd4.milw.wisc.edu> <6482@emcard.UUCP> <739@csd4.milw.wisc.edu>
Organization: The Portal System (TM)
Lines: 23

That joker who posted in this conference about a UART PCB a few months ago
was I. Really.

I did build a UART to add to my 64 so that I could use my Hazeltine, Hazel.

It worked fairly well but it did not help speed up disk access. Of course,
it would make "RS-232" communications more efficient, taking less CPU over-
head, obviously. 

The disk i/o process is still a big stumbling block for the zmodem stuff
being discussed here. Of course, you can always build another add-on 
card dedicated exclusively to disk i/o and add a huge RAM buffer...

The ciruitry for the UART card and another PCB will be submitted to the
Transactor for publication, as soon as I finish beautifying the drawings,
for those of you who want to see it. 

I no longer have my 64 or any of the software. Not even notes on the driver
for the UART, so I cannot provide any details but once you-all see the 
circuit, coming up with a driver for it should be a piece of cake.

JJD
A-N-Onymouse@cup.portal.com