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Date: Wed, 04 Mar 1998 21:30:48 -0800 (PST)
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Organization: The Simon Shapiro Foundation
From: Simon Shapiro <shimon@simon-shapiro.org>
To: John Saunders <john.saunders@scitec.com.au>
Subject: Re: silo overflows (Was Re: 3.0-RELEASE?)
Cc: Evan Champion <evanc@synapse.net>, current@FreeBSD.ORG,
        Matthew Thyer <Matthew.Thyer@dsto.defence.gov.au>,
        Mike Smith <mike@smith.net.au>
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On 05-Mar-98 John Saunders wrote:
> Simon Shapiro wrote:
>> >> Again, don't decapitate me on this one, but does not the 16550 have a
>> >> mode
>> >> by which it will lower DSR and or CTS when the FIFO reaches a certain
>> >> point
>> >> of saturation?
>> >
>> > No, it doesn't, although some of the extended versions do.
>> 
>> Brain-Dead.  Then all bets are off.  In the current software + hardware
>> structure, interrupts will be lost.
> 
> The CD1440 (I think that's the part number) chip in the smart cards
> like Stallion and Cyclades do do automatic CTS/RTS handshaking
> with the modem. They also have very large FIFOs. Which means you can
> run 256 (yes two fifty six) ports at 57600 in a 486 DX4/100 ;-)
> For those that are interested, 4 Stallion 64 port ISA cards.

I was thinkingthe same thing.  I have a Computone here that just sits on
the floor collecting lint from the lanudry dryer.

Simon


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