Date: Wed, 11 Oct 1995 13:05:36 +1000 From: Bruce Evans <bde@zeta.org.au> To: bde@zeta.org.au, msmith@atrad.adelaide.edu.au Cc: hackers@freebsd.org Subject: Re: non-sio UART driver Message-ID: <199510110305.NAA17926@godzilla.zeta.org.au>
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>This doesn't sound unreasonable, although it wasn't clear whether you could >guarantee that you'd get a whole packet passed down to the sio driver >at once. Going on and off the bus inside a packet isn't viable, as you >generate glitches that can throw the listener off. In fact it's guaranteed that ttwrite() will split up output into buffers of size OBUFSIZ = 100. However, this the double buffering should hide any glitches. Glitches would also decrease througput so I don't want them. Bruce
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