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Path: utzoo!linus!decvax!harpo!seismo!hao!hplabs!sri-unix!MCMANIS%USC-ECLC@sri-nic
From: MCMANIS%USC-ECLC%sri-nic@sri-unix.UUCP
Newsgroups: net.micro
Subject: ZRT-80
Message-ID: <15424@sri-arpa.UUCP>
Date: Wed, 11-Jan-84 18:11:00 EST
Article-I.D.: sri-arpa.15424
Posted: Wed Jan 11 18:11:00 1984
Date-Received: Mon, 16-Jan-84 01:09:24 EST
Lines: 13

From:  Chuck McManis <MCMANIS%USC-ECLC@sri-nic>


Latest trick to getting a nice raster from a ZRT-80 : The H-Sync and
V-sync are driven directly by a 74LS86 Xor gate and may not be able
to drive your surplus terminal monitor. If so a transistor buffer must
be added. Additionally, the H sync pulse is only 15us wide, our monitor
requires 22-35 us for the width. The solution is to add a 74121 one shot
as a pulse stretcher. Everything else is fine, now if I could get
VT100 emulation out of it.

				--Chuck
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