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- Path: sparky!uunet!mcsun!Germany.EU.net!lemis!grog
- From: grog@lemis.uucp (Greg Lehey)
- Newsgroups: comp.unix.bsd
- Subject: Re: does the UMC chipset work with 386BSD?
- Message-ID: <2399@adagio.lemis.uucp>
- Date: 12 Nov 92 17:39:37 GMT
- References: <49432@shamash.cdc.com>
- Organization: LEMIS, W-6324 Feldatal, Germany
- Lines: 28
-
- In article <49432@shamash.cdc.com> pbd@runyon.cim.cdc.com (Paul Dokas x4629) writes:
- >I'm looking at a 486DX-33 (2 VESA LB slots, 6 ISA slots, 256K
- >cache, 8 MB DRAM) that uses the UMC chipset with an Intel 486.
- >Has anyone heard of the UMC chipset? And does anyone know if
- >I'm going to have problems running 386BSD?
-
- Well, I have just removed a 486/50 with UMC from my machine, and gone
- back to a 486/33 using an OPTI chip set. Nothing else changed - I had
- a different 486/33 OPTI board (same design, though) in there before.
- I'm running BSD/386.
-
- The OPTI board ran with no problems since March, and I installed the
- UMC board last week. On average, it crashed 5 times a day. This could
- be a defective board, of course, but I didn't have another board to
- compare it with.
-
- In the meantime, a report came out in c't, a German magazine,
- comparing chipsets. It showed that the UMC board is very conservative
- in its bus cycle, and the results with some benchmarks showed down to
- 40% of the performance of other chipsets (i.e. the program ran 2.5
- times as long on a machine with the other chipset). This ties in with
- the fact that my initialisation routines showed a speed only about 10%
- faster than the 33 MHz OPTI chipset.
-
- --
- Greg Lehey | Tel: +49-6637-1488
- LEMIS | Fax: +49-6637-1489
- Schellnhausen 2, W-6324 Feldatal, Germany
-