Date: p 29 Jun 96 21:54:17 PST From: "Brett Glass" <Brett_Glass@ccgate.infoworld.com> To: "Jacob M. Parnas" <jparnas@jparnas.cybercom.net>, henry@zoo.toronto.edu Cc: hardware@FreeBSD.org, bsdi-users@bsdi.com Subject: Re: muliport boards - building a PPP dialup server Message-ID: <9605308361.AA836148602@ccgate.infoworld.com>
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> The TI 17550 can go up to 900kbaud/second, which is a new UART. That's the TI 15570, I believe. It has a 64-byte buffer, as does one of the new Exar/Startech parts. Some of the other solutions use "intelligent" UARTs from Cirrus Logic. The big flaw in the Cirrus Logic parts, however, is that the firmware that runs the chips' internal processors can not be programmed or expanded upon, so your CPU must perform all functions that aren't already built in. And that's a shame. I'd love to see a microcode expansion port (possibly as a bond-out option) on these. --Brett
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