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- From: pyro@casbah.acns.nwu.edu (Leedell J. Miller)
- Subject: Zenon Computers / VL-Bus Spec
- Message-ID: <1993Jan11.153139.24186@news.acns.nwu.edu>
- Followup-To: comp.sys.ibm.pc.hardware,comp.unix.pc-clone.32bit
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- Organization: Northwestern University, Evanston Illinois.
- Date: Mon, 11 Jan 1993 15:31:39 GMT
- Lines: 47
-
-
- A question.... Well, actually two.
- -------
-
- First: Zenon.
-
- After perusing a LOT of ads in several magazines, and studying a lot of
- product reviews, the EISA/VESA VL-Bus systems from Zenon appear QUITE
- appealing from their descriptions and pricing. However, despite their
- claims for their product, I can't seem to find a REVIEW of their
- systems, or any mention of them other than their ads in recent issues of
- Computer Shopper and PC Sources.
-
- Has ANYONE had any experience with Zenon? Good, Bad or otherwise?
-
- -------
-
- Second: VESA Local Bus.
-
- Zenon's systems contain either an EISA/Local Bus combination or an
- ISA/Local Bus combination. However, in both cases, they have THREE
- local bus expansion slots available on their 486DX/50MHz and
- 486DX2/66MHz systems.
-
- I consider this excellent in terms of expandability, but I wonder how
- they can do it. A technical discourse of the VL-Bus specifications in
- the December 1992 issue of Computer Shopper magazine indicate that due
- to timing specifications of the bus, there is an upper limit to the
- number of VL-Bus connectors one can have on a motherboard.
-
- The table shown below indicates the VESA committee's specifications:
-
- Unbuffered Design Buffered Design
- CPU Speed Slots / Devices Slots / Devices
- <= 33MHz (DX2/50&66) 2 2 3 3
- 40MHz 1 2 not recommended
- 50MHz 0 2 not recommended
-
- This last would indicate devices hard-wired into the motherboard, rather
- than using an expansion slot. (sigh) Anybody got an opinion on this?
- Is Computer Shopper's info out of date? Has this technical limitation
- been circumvented, or is Zenon "pushing the spec" with these machines?
- --
- Leedell J. Miller | Academic Computing & Network Services | I said:
- leedell@nwu.edu | Northwestern University, Evanston, IL | "the disk format."
- pyro@nuacvm.BITNET | (708)491-4054 Monday-Friday 0900-1800 | I did *NOT* say:
- powerdril on IRC | FIGHT THE POWER! REPEAL MURPHY'S LAW! | "format the disk."
-