Date: Tue, 11 Jul 1995 14:40:34 -0400 From: dennis@et.htp.com (dennis) To: freebsd-hackers@freebsd.org Subject: Re: Wanted: 100bT EISA ethernet recommendation Message-ID: <199507111840.OAA08675@mail.htp.com>
next in thread | raw e-mail | index | archive | help
>> >> Tom's opinion.... >> > >> >On Tue, 11 Jul 1995, dennis wrote: >> > >> >> The question is, who would build one? EISA cards are too expensive to build >> >> and EISA is too slow for a 100mbs medium. If someone is making them then >> >> I'll bet they have a much bigger marketing dept than engineering. >> > >> > That's wrong. EISA is fast enough for 100mbs ethernet. >> >> It can't be wrong, because any way you slice it its an opinion. Under light >> load anything will work, but under heavy load its nice if your bus >> throughput is greater than the bandwidth. If your EISA card is bus mastering >> it can take over your machine under heavy load. For a workstation, sure, but >> not for a server. And EISA is too expensive for a workstation. >> >> db > >EISA has a bus bandwidth of 33 mega*bytes* per second. > OK. I'll bite. Obviously my spec sheet is old/wrong or I don't get the new math. The orginal EISA spec was 8.3mhz / 32 bits with 4-6 cycle access. This is 88mbs best case with a real expectation of a little better than 60mbs actual xfer capability. The knock on EISA has always been that its not that much faster than ISA so this 32MB/s stuff must be new. db
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199507111840.OAA08675>