Newsgroups: comp.sys.amiga.datacomm
Path: utzoo!utgpu!news-server.csri.toronto.edu!torsqnt!lethe!tvcent!comspec!darrell
From: darrell@comspec.uucp (Darrell Grainger)
Subject: Re: What kind of problem
Organization: Comspec Communications Inc  Toronto Ontario
Date: Tue, 4 Jun 91 01:34:32 GMT
Message-ID: <1991Jun4.013432.4354@comspec.uucp>
Keywords: JRComm comm problems
References: <1991May28.214146.21094@hollie.rdg.dec.com> <1991May29.091005.11302@iitmax.iit.edu> <ATVC&K?@irie.ais.org>
Sender: darrell@comspec (Darrell Grainger)

In article <ATVC&K?@irie.ais.org> tony@ais.org (Tony Poole) writes:
>In article <1991May29.091005.11302@iitmax.iit.edu> technews@iitmax.iit.edu (Kevin Kadow) writes:
>>In 1.02 using a 1084, the screen flickers (sort of an after-image in another
>>color) when the text scrolls.
>>
>>Downloading from a 19.2KB board, Z-modem gets intermittent errors, while 
>>Y-modem 1K (which generally gives less throughput) works fine...
>
>
>  Well, I've tryed every possible combination of colors/resolutions, and I
>can't get JrComm to do this "screen after image flicker thing" it does
>to you on my 1084.

 If you are using an HST or V.32 modem, have ANSI colour turned on and display
scrolling colour text the colours will scroll seperately. This happens on all
the terminal programs I have tried. If you have less colours or a smaller 
variety of colours or no colour scrolling up the screen, you will not see this
effect.

>  As far as the Zmodem errors go, have you tryed setting "Relaxed Timing"
>and/or turning "overdrive" off, if on?  

 I have seen no 16 colour ANSI terminal program which does not go to slow to 
properly support 19200 baud. The amount of clock cycles spent updating the 
display take away from the need to update the serial port 'gets'. If the 
number of colours is reduced the Zmodem download will stop generating errors.
The overhead and lack of streaming in Ymodem makes it slow enough to not
generate errors.

> 
>----------------------------------------------------------------------------
>Tony Poole           Traverse City, MI USA           EMail:tony@irie.ais.org
>____________________________________________________________________________


-- 
Darrell Grainger % Comspec Communications Inc., Toronto, Ontario, Canada
darrell@comspec  % Disclaimer: All opinions expressed are my own. 
(416) 617-1475   % (416) 633-5605	(416)785-3553

