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Path: sserve!newshost.anu.edu.au!harbinger.cc.monash.edu.au!yarrina.connect.com.au!warrane.connect.com.au!kralizec.zeta.org.au!not-for-mail From: bde@kralizec.zeta.org.au (Bruce Evans) Newsgroups: comp.os.386bsd.misc Subject: Re: tip at 38400+ Date: 1 Aug 1994 07:47:35 +1000 Organization: Kralizec Dialup Unix Sydney - +61-2-837-1183, v.32bis v.42bis Lines: 16 Message-ID: <31h65n$9u0@kralizec.zeta.org.au> References: <31gbj7$n1p@sundog.tiac.net> <31geil$g3e@mozo.cc.purdue.edu> NNTP-Posting-Host: kralizec.zeta.org.au In article <31geil$g3e@mozo.cc.purdue.edu>, Mark Willey <willeyma@sage.cc.purdue.edu> wrote: >Consider yourself lucky. I can't go faster than 9600 bps! This is because I >have some cheap-o 16450 UARTs on my motherboard. What type of UARTs do you The FreeBSD driver was designed to work at 115200 bps on a 386/20 with a 16450. Slip throughput is 9500 cps in practice. On faster machines with 16550 it should work at 115200 bps with more 16450's or many more 16550's. However, it may not work with a 16450 at 115200 bps on any machine with SCSI controllers that steal too many cycles from the CPU (my U34F seems to steal up to 240 usec of cycles at once for transferring 16 sectors :-(). It won't work if the system or device that it is connected to is too slow, of course. -- Bruce Evans bde@kralizec.zeta.org.au