Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!samsung!aplcen!haven!adm!smoke!gwyn
From: gwyn@smoke.BRL.MIL (Doug Gwyn)
Newsgroups: comp.unix.questions
Subject: Re: What do all the different parity options mean?
Keywords: parity space mark
Message-ID: <11755@smoke.BRL.MIL>
Date: 6 Dec 89 16:12:28 GMT
References: <4090@amelia.nas.nasa.gov>
Reply-To: gwyn@brl.arpa (Doug Gwyn)
Organization: Ballistic Research Lab (BRL), APG, MD.
Lines: 15

In article <4090@amelia.nas.nasa.gov> izen@cwru.cwru.edu (Steven H. Izen) writes:
>... what does *space* or *mark* mean in a parity choice?

Space is always 0, mark is always 1.

>where is the parity bit stored when 8/even is used?

Assuming the "8" means "8 data bits", 8/even describes a nine-bit
transmission format (actually, in asynchronous mode it will be 11 bits
due to one start and one stop bit per character).

>Is there any good introductory reference to this?

Digital Press used to sell a good intro to data communications
by McNamara.  I don't know if it's still in print.