Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!seismo!rutgers!clyde!cbosgd!ihnp4!chinet!ward
From: ward@chinet.UUCP (ward)
Newsgroups: comp.sys.ibm.pc,comp.misc
Subject: Re: How do PCs talk 115kbps?
Message-ID: <1089@chinet.UUCP>
Date: Sun, 31-May-87 11:21:27 EDT
Article-I.D.: chinet.1089
Posted: Sun May 31 11:21:27 1987
Date-Received: Tue, 2-Jun-87 02:08:11 EDT
References: <1463@ho95e.ATT.COM>
Reply-To: ward@chinet.UUCP (Ward Christensen-)
Distribution: na
Organization: Chinet - Public Access Unix
Lines: 12
Xref: mnetor comp.sys.ibm.pc:4487 comp.misc:624

> How does this work?
> Is it RS-422?
> Can it work multi-drop?
> [can I] connect a PC to a mini-computer at speeds like this?
  The 115Kbps is done on the PC by Brooklyn Bridge, as another product, and
I'm quite sure they do it by disabling interrupts.  This severely limits the
applications that can happen at either end while transfers are going on.
  For example, I've had the keyboard beep at me implying "stop typing" while
doing the transfers (and I wasn't at the typeahead limit).
  No, its not RS-422.  I run BB through about 50' of real Kludge wire (various
ribbon cables, twisted 3-wire (pins 2,3,7), etc between two PC's, one 
upstairs, one down - BB works.  I usually use it between my T1100+ and a PC.