Date: Sat, 29 Jun 1996 14:30:28 -0400 (EDT) From: Henry Spencer <henry@zoo.toronto.edu> To: "Jacob M. Parnas" <jparnas@jparnas.cybercom.net> Cc: Gary Palmer <gpalmer@FreeBSD.ORG>, hardware@FreeBSD.ORG, bsdi-users@bsdi.com Subject: Re: muliport boards - building a PPP dialup server Message-ID: <Pine.3.89.9606291403.B10167-0100000@zoo.toronto.edu> In-Reply-To: <199606291317.JAA07529@jparnas.cybercom.net>
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> I thought the question was on what to expect from UARTS for high speed
> applications. I think Henry suggested using a local ethernet to connect to
> a ISP ethernet <-> ethernet<->ethernet WAN ISDN connection or high
> speed modem <-> home ethernet.
Just to clarify... My suggestion is that you do not want a high-speed
application which looks like a UART to the software, at all, ever. You
want high-speed applications to come in via Ethernet, so your software
is dealing with a packet at a time rather than a character at a time.
It's worth the overhead of having to set up a 0.5m-long Ethernet, which
is fairly trivial nowadays.
Yes, there are people who build high-speed interfaces that look like
UARTs, and they can be cheaper than the ones that sit on the other side
of an Ethernet. You get what you pay for.
Henry Spencer
henry@zoo.toronto.edu
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