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- From: lari@saadi.berkeley.edu (Francesco Lari)
- Newsgroups: comp.os.os2.misc,comp.sys.ibm.pc.hardware
- Subject: Re: EISA/MCA *or* Local Bus? Which is better for multitasking?
- Date: 18 Dec 1992 23:14:29 GMT
- Organization: UC Berkeley Signal Processing VLSI Group
- Lines: 29
- Distribution: world
- Message-ID: <1gtm0lINNaah@agate.berkeley.edu>
- References: <BzBx9G.Ap@utdallas.edu> <1992Dec17.231538.29868@blkbox> <1992Dec18.154505.27040@lth.se> <1gtc6nINNafg@flop.ENGR.ORST.EDU>
- Reply-To: lari@robotics.berkeley.edu
- NNTP-Posting-Host: saadi.berkeley.edu
-
-
- In article <1gtc6nINNafg@flop.ENGR.ORST.EDU>, hilmera@storm.CS.ORST.EDU
- (Andrew Hilmer) writes:
- |>
- |> I was having my monthly drool on the Computer Shopper and I saw an ad for
- |> Local Bus EISA systems. No joke. Microlink, page 401 in the December
- |> issue has their "ELB" systems in 50 and 33 Mhz flavors for $2248 and
- |> $2048. I realize that this isn't VESA compliant. I'm curious, however,
- |> about whether it would be possible to graft VL and EISA. From what I
- |> understand about VL-ISA under OS/2, the usage of memory over 16MB cannot
- |> be handled well because of the 24 bit DMA. If there was a way to make
- |> the VL standard work with EISA, I think that a considerable potential
- |> advantage could be had in the next few years.
- |>
- |> I know that the VL standard is not the optimum standard, but I think that
- |> because of its future market base, it will be difficult for better systems
- |> based on PCI or maybe a PC variant of Quickring to get a toehold. If VL
- |> can have its weaknesses limited by a marriage with EISA, it might have a
- |> chance to avoid being cursed and villified in the future when >16MB systems
- |> become common.
-
- I know that the VESA Local Bus got an ISA interface for doing DMA, but I think
- this doesn't influence the kind of I/O bus that is build into the system.
- Is it possible to get a VESA Local Bus and an EISA/MCA I/O bus? I would
- think so, but maybe there is something I can't quite see that is preventing
- this to happen.
-
- FRANCESCO
-
-