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  • MCA prototyping boards from goodstuff607607

    From Louis Ohland@21:1/5 to All on Sat Aug 14 14:03:21 2021
  • From Tomas Slavotinek@21:1/5 to Louis Ohland on Sun Aug 15 19:07:13 2021
    On 14.8.2021 21:03, Louis Ohland wrote:
    https://www.ebay.com/sch/goodstuff607607/m.html?item=265239521812&hash=item3dc181ea14%3Ag%3A7AMAAOSwyJxgfMJ5&rt=nc&_trksid=p2047675.l2562

    Hmm, I might snag a couple...

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From IBMMuseum@21:1/5 to All on Tue Aug 17 20:55:34 2021
    Hmm, I might snag a couple...

    And strange for the IBM marking, these are actually 3.3/5VDC PCI boards...

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From IBMMuseum@21:1/5 to IBMMuseum on Wed Aug 18 03:24:13 2021
    On Tuesday, August 17, 2021 at 9:55:35 PM UTC-6, IBMMuseum wrote:
    Hmm, I might snag a couple...
    And strange for the IBM marking, these are actually 3.3/5VDC PCI boards...

    In the auction image, the silkscreen of the PCI dual voltages are visible. It is a prototyping board, so maybe the 'extra' PCB and traces could be made into 16-bit microchannel with an AVE connector that hangs out if used anyway - if the voltage and
    ground backplanes aren't tied into the bus pins too badly (and that can be changed too).

    And then we get to the adapter position on the bus...

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Tomas Slavotinek@21:1/5 to IBMMuseum on Wed Aug 18 12:16:41 2021
    On 18.8.2021 5:55, IBMMuseum wrote:
    Hmm, I might snag a couple...

    And strange for the IBM marking, these are actually 3.3/5VDC PCI boards...

    Haha, yep, they sure are!

    Something about the formfactor didn't look quite right to me... and sure
    enough - what's the component side on a Micro Channel board is marked as
    "pin side" here, and then there's the 3.3V rail. So yeah...

    Shame, the price was right and the seller is shipping to the Czech
    Republic for once... oh well.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Tomas Slavotinek@21:1/5 to IBMMuseum on Wed Aug 18 12:32:07 2021
    On 18.8.2021 12:24, IBMMuseum wrote:
    On Tuesday, August 17, 2021 at 9:55:35 PM UTC-6, IBMMuseum wrote:
    Hmm, I might snag a couple...
    And strange for the IBM marking, these are actually 3.3/5VDC PCI boards...

    In the auction image, the silkscreen of the PCI dual voltages are visible. It is a prototyping board, so maybe the 'extra' PCB and traces could be made into 16-bit microchannel with an AVE connector that hangs out if used anyway - if the voltage and
    ground backplanes aren't tied into the bus pins too badly (and that can be changed too).

    And then we get to the adapter position on the bus...

    The pin counts / key positions will be different too. PCI uses a
    slightly different connector than MCA...

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From IBMMuseum@21:1/5 to Tomas Slavotinek on Wed Aug 18 06:34:18 2021
    On Wednesday, August 18, 2021 at 4:32:11 AM UTC-6, Tomas Slavotinek wrote:
    On 18.8.2021 12:24, IBMMuseum wrote:
    On Tuesday, August 17, 2021 at 9:55:35 PM UTC-6, IBMMuseum wrote:
    Hmm, I might snag a couple...
    And strange for the IBM marking, these are actually 3.3/5VDC PCI boards...

    In the auction image, the silkscreen of the PCI dual voltages are visible. It is a prototyping board, so maybe the 'extra' PCB and traces could be made into 16-bit microchannel with an AVE connector that hangs out if used anyway - if the voltage and
    ground backplanes aren't tied into the bus pins too badly (and that can be changed too).

    And then we get to the adapter position on the bus...
    The pin counts / key positions will be different too. PCI uses a
    slightly different connector than MCA...

    I did order one - in addition to the 32-bit MCA version - and can see if I keep it for being an IBM oddity or return it as falsely advertised. At least I have a better potential on a return too, based on location. Did more people buy any?

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Tomas Slavotinek@21:1/5 to IBMMuseum on Wed Aug 18 16:30:14 2021
    On 18.8.2021 15:34, IBMMuseum wrote:
    On Wednesday, August 18, 2021 at 4:32:11 AM UTC-6, Tomas Slavotinek wrote:
    On 18.8.2021 12:24, IBMMuseum wrote:
    On Tuesday, August 17, 2021 at 9:55:35 PM UTC-6, IBMMuseum wrote:
    Hmm, I might snag a couple...
    And strange for the IBM marking, these are actually 3.3/5VDC PCI boards... >>>
    In the auction image, the silkscreen of the PCI dual voltages are visible. It is a prototyping board, so maybe the 'extra' PCB and traces could be made into 16-bit microchannel with an AVE connector that hangs out if used anyway - if the voltage and
    ground backplanes aren't tied into the bus pins too badly (and that can be changed too).

    And then we get to the adapter position on the bus...
    The pin counts / key positions will be different too. PCI uses a
    slightly different connector than MCA...

    I did order one - in addition to the 32-bit MCA version - and can see if I keep it for being an IBM oddity or return it as falsely advertised. At least I have a better potential on a return too, based on location. Did more people buy any?

    I was about to go through the auctions, check how exactly are the boards designed, and possibly grab two or three, but didn't in the end... (with
    all the other distractions happening)

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)