From owner-freebsd-hardware Fri Jul 5 13:03:28 1996 Return-Path: owner-hardware Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id NAA05680 for hardware-outgoing; Fri, 5 Jul 1996 13:03:28 -0700 (PDT) Received: from jparnas.cybercom.net (jparnas.cybercom.net [206.28.135.58]) by freefall.freebsd.org (8.7.5/8.7.3) with SMTP id NAA05671 for ; Fri, 5 Jul 1996 13:03:17 -0700 (PDT) Received: from localhost.cybercom.net (localhost.cybercom.net [127.0.0.1]) by jparnas.cybercom.net (8.6.10/8.6.10) with SMTP id QAA02903; Fri, 5 Jul 1996 16:02:33 -0400 Message-Id: <199607052002.QAA02903@jparnas.cybercom.net> X-Authentication-Warning: jparnas.cybercom.net: Host localhost.cybercom.net didn't use HELO protocol To: mrm@sceard.com (M.R.Murphy) cc: freebsd-hardware@freefall.freebsd.org, admin@ftcnet.com, mrm@marmot.mole.org X-External-Networks: yes Subject: Re: Hi-speed serial input for Pagesat HS-2000? In-reply-to: Your message of Sat, 29 Jun 1996 07:50:18 PDT. <9606290750.AA17683@Sceard.COM> Date: Fri, 05 Jul 1996 16:02:30 -0400 From: "Jacob M. Parnas" Sender: owner-hardware@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk In message <9606290750.AA17683@Sceard.COM>you write: >>was Re: muliport boards - building a PPP dialup server >>On Sat, 29 Jun 1996, Jacob M. Parnas wrote: >> >>> >> I'm confused. I thought the 16550 was good up to 115,200 baud, but when >>> >> ISDN eventually takes over with compression, ~512kbaud will be the norm. >>> >> I don't know if they can handle that... >>> > >>> The TI 17550 can go up to 900kbaud/second, which is a new UART. >>> >>> I've seen a PC Card that costs $199-$319 depending on who you are, >>> and it does everything with a UART on top (the software driver for >>> BSDI will be $95. >> >>I'm having trouble with receive overruns with the 115.2 Kb/s news >>feed from the new Pagesat HS-2000. I'm using a Lava ISA 16C550- >>based com port on a 486DX4-100, 64 MB RAM, BSDI V2.1 news server. >>I talked to 'Mike' at Pagesat who recommended a DOS-based PC as >>a dedicated input spooler which would then feed the BSDI news >>server. >> This seems like an extravagant 'kludge'. I checked >>around a found a couple of external serial buffer boxes, but >>they wouldn't work faster than 38.4 Kb/s. CyberResearch has >>a hi-speed buffered serial card, but it's designed for output >>spooling. >> I think what I need is a hi-speed buffered input serial >>card that's compatible with the Pagesat psfrx program. I think >>16 or 32 bytes of FIFO is not nearly enough since the Pagesat >>data receiver does no flow control. Ideas, suggestions or product >>source would be welcome. >> >>Bernard Klatt Owner Fairview Tech Ctr Ltd. www.ftcnet.com Have you tried looking at buffered boards? There are a lot for PC boards. And some are cheap and work very well. Jacob