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  • Auction: Rare IBM 3270 AT Computer Display Emulation Adapter Board Set

    From Louis Ohland@21:1/5 to All on Sat Dec 18 08:31:14 2021
    Do you know the way to San Jose?

    https://www.ebay.com/itm/124717029128

    BIN, enthusiastic.

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  • From IBMMuseum@21:1/5 to All on Sat Dec 18 11:31:05 2021
    https://www.ebay.com/itm/124717029128

    As documented by John Elliott at http://www.seasip.info/VintagePC/5271.html

    Just the main display adapter, not the APA or 'Programmed Symbols' board - and the "long" 8-bit "host" adapter board is needed for the 3270 PC (there was a '3270 AT' version as marked in the auction, just with an IBM AT as the host system, same adapters).

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  • From RickE@21:1/5 to IBMMuseum on Sat Dec 18 17:49:20 2021
    On Saturday, December 18, 2021 at 2:31:06 PM UTC-5, IBMMuseum wrote:
    As documented by John Elliott at http://www.seasip.info/VintagePC/5271.html

    And of course John Elliott did a very nice job with the overview. Speaking as someone who used the 3720 PC, 3270 AT, 3270 PC/G, 3270 AT/G, 3720 PC/GX and 3270 AT/GX, in my opinion only the 3270 AT/GX with the 5379-C01 display is truly "interesting".
    The 5378 box is slightly smaller than a 5150/5160 case and about as heavy, the cable between the AT/GX display adapter and the 5378 was almost as big as the 5161 expansion connection cable (might be the same cable, I forget). The 5379-C01 was a Sony
    Trinitron, very nice for its day and quite heavy. The 3720 AT/GX Graphics Control Program software set was pretty large (5 diskettes, if my fuzzy memory is firing properly today), the other 3270 PC or AT models had more modest software needs. Using GCP
    with a DOS level higher than 3.30 was... challenging.

    The "best" way to use the 3270 AT/GX hardware (in my view) was to run MYTE (the IBM internal Migratable Yorktown Terminal Emulator) in the 80x50 (columns/lines) text mode, use one (or more) 3270-B ISA coax adapters (MYTE supported up to four, I think)
    and/or a ISA 16/4 Token-Ring adapter for additional terminal sessions. I generally ran 8 terminal sessions on my machine back in the late 80s/early 90s in the Glendale Lab, as I was productive as all get-out. My eventual move to a 8580 running OS/2 and
    a 8514/A video adapter was a big step backward from a productivity view.

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  • From IBMMuseum@21:1/5 to All on Sat Dec 18 19:47:16 2021
    ...use one (or more) 3270-B ISA coax adapters (MYTE supported up to four, I think)...

    The microchannel 3270 have an 'A' (@E7FF.ADF) and 'B' (@E1FF.ADF) versions too - An E7FF 'A' is solitary, whereas up to four 'B' E1FF adapters could be hosted on the same system. Is that maybe the difference (the 8-bit adapter went "short" too, and can't
    be used on the 3270 PC for what John Elliott says) on the 8-bit adapters?

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  • From gfretwell@aol.com@21:1/5 to ibmmuseum@gmail.com on Sun Dec 19 00:21:30 2021
    On Sat, 18 Dec 2021 19:47:16 -0800 (PST), IBMMuseum
    <ibmmuseum@gmail.com> wrote:

    ...use one (or more) 3270-B ISA coax adapters (MYTE supported up to four, I think)...

    The microchannel 3270 have an 'A' (@E7FF.ADF) and 'B' (@E1FF.ADF) versions too - An E7FF 'A' is solitary, whereas up to four 'B' E1FF adapters could be hosted on the same system. Is that maybe the difference (the 8-bit adapter went "short" too, and can'
    t be used on the 3270 PC for what John Elliott says) on the 8-bit adapters?

    MYTE supported 4 VM sessions but it was all down one coax/adapter. You
    also had a DOS box that you could run W/3.1 on and open multiple
    applications on. I occasionally had 6 or 7 things going at once.
    Usually I did everything in DOS
    The cool thing was running native DOS, you also could use utilities
    that ran at the machine level. One I liked was REDLPT that would
    intercept whatever you sent to LPT1 and write it to a text file. I
    could "print" a view from DB2 on VM and then import it directly into
    dBase as a "blank delimited" file. You could also use CE3 to do block
    copies of things you could select on the screen just about any way you
    wanted to instead of that sequential way Windows does it. (vertical
    columns and such) without loading it into a spreadsheet program.

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  • From David Wade@21:1/5 to Louis Ohland on Sun Dec 19 08:38:51 2021
    On 18/12/2021 14:31, Louis Ohland wrote:
    Do you know the way to San Jose?

    https://www.ebay.com/itm/124717029128

    BIN, enthusiastic.

    Just to be pedantic, its not an Auction, its a "Buy it now" with a price
    of $224.99 and its been there since the 17th may, so over 6 months.

    The software does not match the adaptor cards, its for the SDLC card.

    So it might be rare, but it obviously isn't valuable.

    Dave

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