Date: Sun, 10 Dec 1995 00:46:24 -0800 (PST) From: batie@agora.rdrop.com (Alan Batie) To: questions@freefall.freebsd.org Subject: Re: Digiboard PC/16e Message-ID: <m0tOhOq-000AmYC@agora.rdrop.com> In-Reply-To: <199512100001.QAA00330@freefall.freebsd.org> from "owner-questions-digest@freefall.freebsd.org" at Dec 9, 95 04:01:04 pm
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> From: Sergio Lenzi <lenzi@cwbtwo.bsi.com.br> > Date: Sat, 9 Dec 1995 12:07:59 +0000 () > Subject: Re: Digiboard PC/16e > > Anyway a question: > If I would use an Inteligent board in a char by char basics (-icanon) > the board would be used like a dumb one wright? > that is the char entered at the serial port will be processed by the > kernel one char at a time, the same way a dumb board operates. > comments??? I have a Pentium 133 with 2 Boca 2016's; all of one board are in use, and 4 or 5 lines of the second. I'm still seeing silo overflows. Apparently, the ISA I/O bandwidth is too limited to cope with much traffic. If I understand the situation correctly, boards like the Digiboard use shared memory and have much larger buffers, so 1. the throughput capacity is higher due to using memory cycles instead of I/O cycles and 2. It takes a lot more to overrun the larger buffers. At least that's my current understanding... -- Alan Batie ______ batie@agora.rdrop.com \ / Freedom for me to be and do +1 503 452-0960 \ / only what *you* approve of 45 28 59 N / 122 43 20 W / 440' MSL \/ is no freedom at all. It is my policy to avoid purchase of any products from companies which use unrequested email advertisements or telephone solicitation.
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