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From: stripes@pix.com (Josh Osborne)
Subject: Re: The ultimate 386BSD machine? (FAQ fodder)
Message-ID: <BvwpnM.6Bp@pix.com>
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Organization: Pix Technologies -- The company with no adult supervision
References: <1992Oct8.072512.8700@elroy.jpl.nasa.gov> <D87-MAL.92Oct9193909@oddjob.nada.kth.se>
Date: Sat, 10 Oct 1992 13:04:31 GMT
Lines: 25
In article <D87-MAL.92Oct9193909@oddjob.nada.kth.se> d87-mal@oddjob.nada.kth.se (Mats Löfkvist) writes:
[...]
>a DX2/66 system. On a local bus system it will differ, but probably the
>OTHER way around as the VL bus spec limits the bus speed to 40 MHz
>(DX2/66 systems will run at 33 MHz, DX/50 will probably run at 25 MHz).
I had heard that VL complient cards should run with the VL clocked up to
66Mhz. That seems costly, and still a stop-gap mesure (the clock should
be run at a standard slow speed, each card should be probed for it's fastest
speed, the bus should then be run at the lowest found speed, or the fastest
the motherboard can support if that's slower... that would work until
Intel had a 64-bit CPU). Anyway the only VL-system I have used had a jumper
on the SCSI card (VL version of the AHA 1420, it wasn't that fast) for the
motherboard speed with the settings 25, 33, and 50. I don't know if that
was something the card needed for itself, or for the VL interface.
Nothing I have read about VL (other then the "up to 66Mhz" bit) has said
anything but "local bus runs at the same speed the CPU does", not that
what Computer Shopper says has to be right...
--
stripes@pix.com "Security for Unix is like
Josh_Osborne@Real_World,The Multitasking for MS-DOS"
"The dyslexic porgramer" - Kevin Lockwood
We all agree on the necessity of compromise. We just can't agree on
when it's necessary to compromise. - Larry Wall