Subject: Re: Console pinouts on MicroVAX II
To: NetBSD/VAX Mailing List <port-vax@NetBSD.ORG>
From: Brian D Chase <brianc@carpediem.com>
List: port-vax
Date: 05/04/1997 12:56:30
Okay, so in summary I personally have learned the following:
1. The RS-232 is officially only specified on the DB-25 connector.
2. At least DEC and IBM have their own RS-232 subsets mapped on a 9 pin
connector.
3. The 9 pin connector isn't a DB-9 connector because there is no such
thing, this connector is in fact a DE-9.
4. Mapping subsets of the official RS-232 to smaller connectors makes some
people unhappy. This is either because it confuses the one true RS-232
standard, or because it confuses people like me trying to make my own
cables.
5. IBM's subset of RS-232 mapped to DE-9 is brain-dead (I completely agree
when looking at how they mapped things).
6. There are a number of people in Sweden who really know their cabling
standards and related terminology.
Thanks for all the clarification. I think I smell a tiny-FAQ.
-brian.
---------------------------------------------------------------------------
Brian D. Chase Unix/Network Shaman brianc@carpediem.com
-- Compression, Inc. - 13765 Alton Pkwy, Suite B - Irvine, CA 92618, USA --