Date: Thu, 05 Mar 1998 16:18:38 +1100 From: John Saunders <john.saunders@scitec.com.au> To: shimon@simon-shapiro.org Cc: Mike Smith <mike@smith.net.au>, Matthew Thyer <Matthew.Thyer@dsto.defence.gov.au>, current@FreeBSD.ORG, Evan Champion <evanc@synapse.net> Subject: Re: silo overflows (Was Re: 3.0-RELEASE?) Message-ID: <34FE35AE.181C67A7@scitec.com.au> References: <XFMail.980304205551.shimon@simon-shapiro.org>
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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. Cheers. -- +------------------------------------------------------------+ . | John Saunders mailto:John.Saunders@scitec.com.au (Work) | ,--_|\ | mailto:john@nlc.net.au (Home) | / Oz \ | http://www.nlc.net.au/~john/ | \_,--\_/ | SCITEC LIMITED Phone +61 2 9428 9563 Fax +61 2 9428 9933 | v | "By the time you make ends meet, they move the ends." | +------------------------------------------------------------+ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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