Xref: utzoo comp.os.minix:6658 comp.sys.amiga:37758 comp.sys.amiga.tech:6456
Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!cs.utexas.edu!uunet!mcvax!cernvax!ethz!forty2!claudio
From: claudio@forty2.UUCP (Claudio Nieder)
Newsgroups: comp.os.minix,comp.sys.amiga,comp.sys.amiga.tech
Subject: Re: 75/1200 baud modem in software (Yes!)
Keywords: modem break signals
Message-ID: <822@forty2.UUCP>
Date: 2 Aug 89 19:13:42 GMT
References: <539@vice2utc.chalmers.se> <60796@linus.UUCP>
Reply-To: claudio@forty2.UUCP (Claudio Nieder)
Organization: Exp. Physics University Zuerich
Lines: 10

As I know somebody who has the MultiTerm Videotex program, I took my
oscilloscope and attached it to that Amiga to see how the 1200/75 bps are
produced there. What that program does is, it produces from every
character a stream of character in such way, that when you send them
out at 1200 bps it will result in a waveform very similar to that
required by a 75 bps output. Of course there remain some spikes, because
the start and stop bits are not under the programmers control, but
probably they don't disturb, or you can filter them out. 

				claudio