Date: Fri, 25 Aug 1995 13:47:02 -0400 From: dennis@et.htp.com (dennis) To: terry@cs.weber.edu (Terry Lambert) Cc: hackers@freebsd.org Subject: Re: ISDN Anyone? Message-ID: <199508251747.NAA00140@mail.htp.com>
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>> > There is actually a lot more promise in a 16550 or 16650 at 460800 bps. >> > You only get 1/16th or 1/32th the number of interrupts. >> >> Hmmm. I find that the serial interrupt overhead is pretty intense at 115.2 >> even with a 16550. You know some secret for doing this I don't? > >That's because it's being done wrong. > >You take the interrupt and poll like hell in the service routine to handle >higher data rates. You can do 115k on a non-FIFO'ed UART using this >technique. > One interrupt per packet with a smart sync card. db
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