Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!mips!servitude!rogerk
From: rogerk@mips.COM (Roger B.A. Klorese)
Newsgroups: comp.sys.mips
Subject: Re: TCP/IP on RC6280
Keywords: trailers
Message-ID: <456@spim.mips.COM>
Date: 14 Jan 91 04:43:56 GMT
References: <1991Jan9.144544.22626@sobeco.com> <4922@srava.sra.co.jp> <1991Jan13.214030.27744@sobeco.com>
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In article <1991Jan13.214030.27744@sobeco.com> stacy@sobeco.com (s.millions) writes:
>I have fixed this by brain damaging the device driver to not use block
>mode on out bound packets. Will try a more elegant fix when time allows.

RISC/os 4.52 includes a more elegant fix.  For RC62x0 systems, multiples of
two will be used; the DMA system allows block mode then for all but the final
partial word, and the last junk byte is handled correctly on other systems.
For non-RC62x0 systems, going to a multiple of two will disable block mode
and will slow Ethernet transfers, so we will allow a kopt option
to control whether or not roundup is done.  If you have the
extra-bytes problem on a non-RC62x0 system, you may disable roundup,
at the cost of Ethernet speed.
-- 
ROGER B.A. KLORESE                                  MIPS Computer Systems, Inc.
MS 6-05    930 DeGuigne Dr.   Sunnyvale, CA  94086              +1 408 524-7421
rogerk@mips.COM         {ames,decwrl,pyramid}!mips!rogerk         "I'm the NLA"
"The problem with the rat race is even if you win you're still a rat." - Tomlin