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From: smaug@eng.umd.edu (Kurt Lidl)
Newsgroups: comp.sys.amiga.tech,comp.sys.amiga.hardware
Subject: Re: AMIGA too slow for speeds higher than 9600 Baud? HELP!
Summary: Plenty-O-Speed
Message-ID: <1990Apr12.133830.17051@eng.umd.edu>
Date: 12 Apr 90 13:38:30 GMT
References: <02373.AA02373@spirit.kref.sub.org>
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In article <02373.AA02373@spirit.kref.sub.org> rob%spirit@impch.imp.com writes:
>Now he has trouble with his AMIGA-1000 and the HST at speeds higher than
>9.600 baud! The Amiga just loses some bytes when receiving data with high
>speeds (>9600Bit/s) (it also mixes/doubles data or spits them out too late).
>
>[much about switching the low-level system drivers, kickstarts, et al]
>
>We're wondering why telecommunication-programs have got gadgets for speeds
>upto 57.6kBit/s, when the AMIGA normally can't handle more than 9600?

It can handle speeds up to 19.2 kbps quite OK.

>We tested it with JRCOMM V0.94,V0.99j and Platinum Online.

Try VT100 v2.9A and see it EVER drops a character.
Try Dnet at 19.2 Kbps and see if it ever fails.  I have used both
of these packages at the above speeds and never had a problem.
I did notice that the Dnet throughput was lower at 38.4 Kbps than at
19.2kps, so there appears to be some sort of interaction at *that*
speed, but nothing lower than that...  Matt didn't have much to say
about the slower rates at 38.4, so I guess he never got around to
fully tuning the software/isolating the bottleneck in the Dnet
code at that speed.

Dnet was under AmigaDOS 1.2 on a B2000, with a 68010.
VT100 under AmigaDOS 1.2 and 1.3, same machine as above.

I seem to remember hearing the Bryce was giving the serial drivers
a work-over for 1.4, or maybe a few too many of my neurons mis-fired
at the wrong time.  Maybe some of the folks at Commodore could
hint if 1.4 will have improved serial driver support...

>R o l a n d   B l e s s | UUCP: rob@spirit.kref.sub.org                       |
--
/* Kurt J. Lidl (smaug@eng.umd.edu) | Unix is the answer, but only if you */
/* UUCP: uunet!eng.umd.edu!smaug    | phrase the question very carefully. */