Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!tut.cis.ohio-state.edu!ucbvax!ucsfcgl!cca.ucsf.edu!wet!epsilon
From: epsilon@wet.UUCP (Eric P. Scott)
Newsgroups: comp.terminals
Subject: Re: vt100 and vt102
Summary: How about a straight answer for a change?
Keywords: vt100 and vt102
Message-ID: <830@wet.UUCP>
Date: 6 Dec 89 08:55:34 GMT
References: <16015@pollux.UUCP> <1989Dec4.032135.6569@elroy.jpl.nasa.gov>
Reply-To: epsilon@wet.UUCP (Eric P. Scott)
Organization: Wetware Diversions, San Francisco
Lines: 15

A VT102 is a nonexpandable terminal equivalent to a VT100 with
Advanced Video Option and Printer Port.  In addition it supports
half-duplex communication, asymmetric full-duplex (half duplex
with secondary channel), and modem control, which the VT100
does not.  The VT102 is a slower terminal than the VT100, hence
the infamous "disable autorepeat" kludge in EDT.

From a software standpoint, a VT102 is a VT100 with insert/delete
line/character capability (considering that AVO is a "non-
optional option" for VT100s, but most do not have Printer Ports,
and DEC in their infinite wisdom tied insert/delete to having a
printer port installed; note that the only real loss is the
character functions, as the base VT100 supports scrolling
regions.)
					-=EPS=-