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IBM Model M 1996 with Teensy2.0++

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fer2d2:
Hello!

I have an IBM Model M with part number 1391405.

Instead of having two ribbons, it has only one attached to a PS2 controller.

Here are some pictures:







I would like to replace the PS2 connector with a USB, and I also wanted to put a board with a Teensy2.0++ and flash QMK firmware to remap some keys and have multiple layers.

I have seen many projects for IBM keyboards with two ribbons, but none for this keyboard.

I would like to know if someone can help me. I would like to know:

- Which pins of the ribbon represent rows and which represent columns of the matrix.
- This keyboard has 25 pins, when in those with two ribbons there are usually 16x8 (24 pins in total). What is the pin number 25 for?

Thanks in advance.

Tactile:
If the controller is working there is no need to replace it. You only need to convert the controller PS/2 output (that white connector on the board) to USB. As an added bonus you only need to work with 4 wires instead of the whole matrix.

Here's one way to convert, or you could go with this solution.

fer2d2:
Hi!

Thank you very much for your response. I was able to use teensy with the TMK Firmware.

This is the result:







Cheers!

Tactile:
XLNT!  :thumb:

Great job!

Slywanin:
why......

It's so pure. & you desecrated it but cutting it open.....

 :D

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