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From: gert@targon.UUCP (Gert Kanis)
Newsgroups: comp.sys.amiga,comp.sys.amiga.tech
Subject: Re: 75/1200 baud modem in software?
Summary: probably need an interspeeder
Keywords: modem , videotex
Message-ID: <578@targon.UUCP>
Date: 14 Jul 89 13:46:17 GMT
References: <417@bpdsun1.UUCP> <539@vice2utc.chalmers.se>
Reply-To: gert@targon.UUCP (Gert Kanis)
Followup-To: comp.sys.amiga
Organization: Nixdorf Computer BV., DO, P.O. Box 29,Vianen, The Netherlands
Lines: 30

In article <539@vice2utc.chalmers.se> d5kwedb@hacke9.dtek.chalmers.se (Kristian Wedberg) writes:
>I've written a Videotex program (Prestel type) for the Amiga, a kind of
>communication program. Trouble is, here in Sweden some folks have 75/1200
>
>As it is, I have no idea how to support 75/1200, or indeed, if it's at all
>possible.

Problem you will have is that the rs232 port of the Amiga can only be
set to 100 baud (bits per sec. probably this time) as the LOWEST speed!
(It one of the little things the Amiga designers forgot :=)  )

If you use a 75/1200 modem with an interspeeder the modem would take care
of the speed conversion. However those modems are much more expensive.

>
>Altzo, is it possible to transmit 75 bit/s and receive 1200 bit/s over
>the serial port? At the same time?
>	
>	wonders kitte				d5kwedb@dtek.chalmers.se

usualy in such cases (software) switching has to be done when changing
from receiving to sending and vice versa.

+-----------------------------------------------------------------+
| The smoker you drink,|  Gert Kanis, SWP                         |
| the W.C.             |  Nixdorf Computer BV, Postbus 29         |
|----------------------|  4130 EA Vianen, Netherlands.            |
| I do not represent   |  E-mail :    targon!gert@nluug.nl        |
| anyone elses opinion.|  or ..!mcvax!targon!gert                 |
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