Date: Tue, 09 Apr 96 14:04:51 PST From: "Brett Glass" <Brett_Glass@ccgate.infoworld.com> To: Terry Lambert <terry@lambert.org> Cc: questions@FreeBSD.org Subject: Re: Artisoft AE-3 Ethernet card: How to use large buffer? Message-ID: <9603098290.AA829087812@ccgate.infoworld.com>
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> You could always try it. I don't think it will work, since it's > unlikely to have compatable gate array settings. I'm not sure, but I believe that the internal buffer is not directly accessible on NE2000 clones. As I understand it, the RAM is accessible via programmed I/O after setting a pointer register. (This is one of the common criticisms of the architecture: PIO isn't quite as fast as shared memory.) > You need to set mem_end to mem_start + 64k. This should be done in > whichever probe routine is coming true. Aren't the mem_end and mem_start parameters used for cards that have shared memory (rather than a PIO/counter scheme)? > This assumes that, unlike some cards, there is not only an 8k window > to get at the memeory (in which case you want to leave it alone). Again, I'm not certain, but I believe that access to the buffer does not take place via a memory window at all. --Brett
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