Re: Does anyone know how to switch individual serial port lines on/off ?

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#15

From: Mr D.J. Burbridge
Date: Wed, 01 Nov 1995 11:03

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In article <31OCT199522341928@erich.triumf.ca> bennett@erich.triumf.ca (P.Bennett) writes:
>
>You will have no direct control of the serial data lines, pin 2 or 3.  There
>are a few controllable pins, if you can write directly to the UART control
>register, but the levels will be either +12 or -12 - not 0 or +5.

Is this the case on a PC? I know the RS232 *used* to be +/-12V, and the
RS423 was introduced as a +/-5V version, but I thought RS232 these days was
also +/-5V? Certainly (as I believe I have mentioned in this group before
:-)) I can connect my PC's RS232 to my BBC's RS423 with no (apparent)
problem (yet...)
-- 
============================================================================
| David Burbridge (d.burbridge@ic.ac.uk) | Change is inevitable...         |
| Mech Eng Dept, Imperial College, London|  except from a vending machine! |
============================================================================

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Path: arc1-ca.pugleaf.net!news.cc.ic.ac.uk!djbur
Newsgroups: comp.os.ms-windows.programmer,comp.lang.c,comp.lang.basic,comp.lang.basic.misc,comp.lang.basic.visual.misc
Subject: Re: Does anyone know how to switch individual serial port lines
 on/off ?
Message-ID: <477k6r$b8q@oban.cc.ic.ac.uk>
From: djbur@ic.ac.uk (Mr D.J. Burbridge)
Date: 1 Nov 1995 11:03:55 GMT
References: <476c4i$op9@news.dmpe.CSIRO.AU> <31OCT199522341928@erich.triumf.ca>
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