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Path: utzoo!hcrvax!hcrvx1!hugh
From: hugh@hcrvx1.UUCP (Hugh Redelmeier)
Newsgroups: net.micro,net.micro.cpm
Subject: Re: Kaypro connected to LAN at 9600 baud
Message-ID: <1156@hcrvx1.UUCP>
Date: Mon, 6-May-85 12:43:31 EDT
Article-I.D.: hcrvx1.1156
Posted: Mon May  6 12:43:31 1985
Date-Received: Fri, 10-May-85 05:41:38 EDT
References: <10417@brl-tgr.ARPA>
Reply-To: hugh@unix.UUCP (Hugh Redelmeier)
Organization: Human Computing Resources, Toronto
Lines: 16
Summary: 

>I have had the same problem with both a Kaypro 2 and a Kaypro 4 when they
>are connected to a Sytek LAN here at NOSC.  It skips part of a line at
>any speed greater than 1200 baud.  I have used Kaypro's TERM program,
>MODEM7, KERMIT, and the NOSC TRANSFER terminal programs on the Kaypros
>with the same result.

The Kaypro does scrolling by moving all the characters in the video
RAM up one line (using a Z80 block move instruction).  This takes a
long time.  The solution is to use a program that can accept input
from the host while the scrolling is being done.  This is not
trivial because it requires an interrupt handler that bypasses the
BIOS.  It might be necessary to have XON/XOFF handshaking too.  I wrote
such a program and use it regularly on my Kaypro II (talking at
9600 Baud to my UNIX machine).  Micro Cornucopia also has one on
a public-domain disk (and much other stuff of interest to Kaypro
hacks).