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1990-06-05
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Path: altitude!philmtl!uunet!tut.cis.ohio-state.edu!zaphod.mps.ohio-state.edu!uakari.primate.wisc.edu!xanth!cs.odu.edu!Amiga-Request
From: Amiga-Request@cs.odu.edu (Amiga Sources/Binaries Moderator)
Newsgroups: comp.sources.amiga
Subject: v90i176: st - interrupt-driven serial i/o testbed, Part01/01
Message-ID: <12705@xanth.cs.odu.edu>
Date: 4 Jun 90 00:05:36 GMT
Sender: tadguy@cs.odu.edu
Reply-To: jcs@crash.uucp
Lines: 747
Approved: tadguy@cs.odu.edu (Tad Guy)
X-Mail-Submissions-To: Amiga@cs.odu.edu
X-Post-Discussions-To: comp.sys.amiga
Submitted-by: jcs@crash.uucp
Posting-number: Volume 90, Issue 176
Archive-name: util/st/part01
This code directly accesses the hardware and achieves very high
baud rates without errors. This code should be legal if the serial
device is first opened and exclusive access is granted. Speeds of
over 130k baud between a stock, nofastmem 500 and a 25mhz GVP 68030
have been achieved. The '030 Amiga can go much faster; it can read
at least 223,720 baud. The 500 poops out at 132,575 baud. Writing
fast is no problem, reading eats up some bandwidth, and is thus
the bottleneck. Polled I/O (yuk) can yield faster rates. These
baud rates were accomplished with a direct 2,3,7 wire, 50 foot
shielded cable. Max baud rates may vary depending on cable and
hardware configurations.