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PCI to ISA card

Discussion in 'Electronic Design' started by Fla, May 6, 2005.

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  1. Fla

    Fla Guest

    I was looking for a PCI to ISA card in order to re-use an ISA card with
    PCI connector of modern PC. I found solutions.
    Do you know further solutions?

    Thanks in advance
  2. Art

    Art Guest

    Check out they seem to have a few unique items. or 'Google" for
    one, sure you will have a few good hits to follow up on.
  3. A search on "pci to isa" + card turns up a few hits. PLX has an RDK
    for the 9050 PCI to ISA bridge, but I suspect it's pricey.
  4. Guest

    It isn't easy to do, since the PCI technology is totally different from
    the comparatively simple ISA bus.

    Your best bet will be to locate an adapter card, or a motherboard
    having both PCI and ISA slots.

    Harry C.
  5. keith

    keith Guest

    Actually, it's not hard to do at all, unless the ISA card is a bus master
    (_very_ few were). Many devices use the PLX9050 PCI to ISA bridge to do
    exactly this.
  6. Fla

    Fla Guest

    keith ha scritto:
    Thank you all for the replies.
    I decided to use a development kit like PLX one (PCI 9052RDK-LITE, the
    upgraded version of PLX9050) for my purpose, so I'm looking for a
    development environment like that, for migrating ISA card to PCI

    Best regards
  7. Pooh Bear

    Pooh Bear Guest

    How can an ISA card be a *bus master* ?

    ISA is just the micro's data and address bus basically with a few extra pins
    to the interrupt controller !

    I think only EISA and MCA cards had that ability prior to the adoption of

    Then goes and wonders over some of the earlyish Adaptec SCSI controllers e.g
    AHA1540/1542. In which case how did they do it ?

  8. The device asserts a DRQ, waits for the corresponding DACK, then
    asserts MASTER, at which point it can drive the address/data/control
    lines as needed.
    It's a *little* more than that.
    No, it was there in ISA too, though not often used.
    Yep. There was also the IBM Multi-media Modem (sound card/modem
    combined on one DSP) that used bus mastering to swap its OS and data in
    and out of system memory.
  9. Pooh Bear

    Pooh Bear Guest

    Thanks for the filling me in on the missing bits. I'll have to revisit the ISA bus
    standard to get to grips with this.

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