Can you identify the connector on the top left card ? I believe its a display adapter of some kind.

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SoftRecommendation86@reddit

it looks like an old rs6000? maybe their custom video card?

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As others have suggested, a picture of the PC would be helpful. There were some cards that used that port for video capture, but I don't recall any of them with that port on the bottom. There were also a few multifunction cards with a similar port and a splitter cable, with one end plugged into the port on the card and the other end split into a serial port and a game controller port, or two.

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dst1980@reddit

The left card is almost certainly NOT a standard video card. While the HD-26 was not uncommon for pre-DVI LCD monitors, it was never paired with DB-25. The middle card is most likely token ring, as many are saying. The right card looks to have the correct and correct gender ports to be MDA or Hercules compatible. The only other port I see that has any chance of being a video output would be the unidentified DIN (round) port next to the keyboard port.

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CeldonShooper@reddit

A DB26 female connector. This doesn't help much. If you can, show a picture of the PCB of the card it belongs to. Then we can do better guesses.

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Year3030@reddit

DB26, "Now that's a name I have not heard in a long time..."

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LocalH@reddit

*DA-26

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SaturnFive@reddit

The left card is unusual. 25-pin male could be serial but seems unlikely when paired with the unknown 26-pin female connector, especially in 3 rows like that.

Center card is a token ring network card.

Right card looks like a multi I/O card with 25-pin female for parallel and 9-pin male for serial.

Below it has what looks like another 9-pin serial port, an unknown 6-pin DIN port, then a regular AT keyboard port adapted passively to PS/2.

Some kind of industrial machine with purpose specific card(s) in it.

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cdheer@reddit

More likely card on the right is an MDA card. Lots of them came with parallel ports.

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redditshreadit@reddit

Aren't mda ports female.

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cdheer@reddit

It looks female to me but not the clearest picture. If it’s male then it’s definitely an I/O card.

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compu85@reddit

It might be a connector for a multi port serial adapter.

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villefilho@reddit

It's a nintendon't port connector

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commodore64@reddit

Game Controller port

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RFC793@reddit

Same size d-sub connector (DA), but the 26 pin variant instead of the 15 used for gamepads.

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campbrs@reddit

9 pin is a Madge Token Ring card

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theotherkiwi@reddit

Card on the left is almost certainly a serial (DB-25 lower) and a joystick port that were often combined with a serial port to connect a serial mouse.

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cdheer@reddit

Nope to both. Serial ports tended to be db9 mail, and game ports were db15.

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rosmaniac@reddit

DE9, DA-15. DB-25 is a correct usage. The shell sizes are shown in the article here:

https://en.wikipedia.org/wiki/D-subminiature

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