Article View: comp.sys.amiga.tech
Article #3676Re: DNet running under Sun OS 3.5
From: Kent D. Polk
Date: Thu, 31 May 1990 02:21
Date: Thu, 31 May 1990 02:21
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2295 bytes
In article <dillon.3912@overload.UUCP> dillon@overload.UUCP (Matthew Dillon) writes:
>>In article <981@tau.sm.luth.se> d88-mbe@sm.luth.se (Michael Bergman) writes:
>>
>>Now for my question:
>>I have read articles here (or in c.s.a.) saying that some of you use
>>38400 bps between Sun and Amiga using a terminal program (JRComm
>
> I advise not to run DNet faster than 19.2KBaud on the built in serial
> port simply because a standard Amiga cannot receive faster without loosing
> data... you wind up going slower due to packet errors. That's all. Since
> both DNet and terminal programs use the serial.device one assumes the
> same problem would occur with the terminal programs.
While a 68000 Amiga may have trouble, 68020/68030 Amigas don't. Dnet
can send & receive at 38400 with no trouble at all with such.
> UNIX systems tend to barf on serial at high data rates. Generally, the
> kernel buffer (usually 256 bytes) will get full before the user task
> has a chance to drain it with read(), causing lost data. The problem can
> normally be avoided by using a 7-wire (e.g. RTS/CTS) interface which is
> certainly possible if you are directly connected.
No disagreement here. I have two Amiga's hooked to a Sun 3/260 which
can handle 38400 reception most of the time with only Xon/Xoff. I
would like to try RTS/CTS, but have never gotten any Dnet past 2.01
to completely work (2.01 doesn't support RTS/CTS) and haven't had
the time to try anything but trivial debugging, so ...
====================================================================
Kent Polk - Southwest Research Institute - kent@swrinde.nde.swri.edu
"Anything worth doing is worth overdoing" ( :^) )
====================================================================
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucsd!swrinde!kent From: kent@swrinde.nde.swri.edu (Kent D. Polk) Newsgroups: comp.sys.amiga.tech Subject: Re: DNet running under Sun OS 3.5 Message-ID: <26362@swrinde.nde.swri.edu> Date: 31 May 90 02:21:13 GMT References: <981@tau.sm.luth.se> <dillon.3912@overload.UUCP> Reply-To: kent@swrinde.UUCP (Kent D. Polk) Organization: Southwest Research Institute, San Antonio, Texas Lines: 32