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- Path: sparky!uunet!stanford.edu!morrow.stanford.edu!morrow!aoki
- From: aoki@risk.stanford.edu (ikuro aoki)
- Newsgroups: comp.sys.ibm.pc.hardware
- Subject: Re: EISA/VL-Bus combination MBs #2
- Date: 18 Dec 92 22:41:15
- Organization: Stanford University, Stanford, CA, USA.
- Lines: 53
- Distribution: world
- Message-ID: <AOKI.92Dec18224115@risk.Stanford.EDU>
- References: <1gq2ccINN5ns@wezea.usc.edu>
- NNTP-Posting-Host: risk.stanford.edu
- In-reply-to: wbedard@wezea.usc.edu's message of 17 Dec 1992 06:20:59 -0800
-
- Hello
-
- >>Could someone please give me COMPLETE names and/or 800 # for
- >>these manufacturers.
-
- Advanced Integration Research, Inc.
- 2188 Del Franco St.,San Jose, CA 95131
- phone:(408)428-0800 facsimile:(408)428-0950
-
- Excuse me, I don't know the phone number of NICE and Hawk.
-
- NICE's motherboard is avairable from,
- Central Computer Systems, Inc.
- 820 Kiely Blvd.,Santa Clara,CA 95051
- phone:(408)241-0815 facsimile:(408)241-0390
- (EISA/VLB 256k cache w/o CPU $595, current price)
-
- Hawk motherboard is avairable from,
- PC Warehouse (Palo Alto shop)
- 454A California Avenue, Palo Alto, CA
- phone:(415)321-9288
-
- >>I know that this info is probably readily available
- >>but what exactly do you mean when you say that 50 MHz exceeds
- >>the VESA recommendation.
-
- I meant simply as same as I wrote. For 50 MHz(ext.) clock machines,
- any external(slot) peripherals are not recommended to implement.
- The VESA VL-bus Specification Version 1.0 is avirable from the VESA.
- ($100 for individuals)
-
- The Video Electronics Standards Association
- 2150 North First Street, Suite 440, San Jose, CA 95131-2020
-
- >>All I know is that 2 is the widely accepted limit for the number of
- >>VL-Bus slots that a cpu can handle as far as load is concered.
-
- Detailed information is described in the standard.
- Un-buffered Design Buffered Design
- Slots Devices Slots Devices
- 33MHz or slower 2 2 3 3
- 40MHz 1 2 (not recommended)
- 50MHz or faster 0 2 (not recommended)
-
- According to my humble experiences, localbus devices are not so easy
- to use in very high speed motherboards(40/50MHz) as slow ISA boards.
- I am using Orchid F1280/VLB but I had to consider memory waits, slot
- position(my problem was position dependent), software improvements.
-
- Sorry for my slow responce and bad(really) english writing.
- --
- Ikuro Aoki
- aoki@risk.Stanford.EDU
-