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Author Topic: IBM Model M 1996 with Teensy2.0++  (Read 8176 times)

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Offline fer2d2

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IBM Model M 1996 with Teensy2.0++
« on: Tue, 23 August 2022, 06:51:57 »
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.


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Offline Tactile

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  • Location: Portland, OR
Re: IBM Model M 1996 with Teensy2.0++
« Reply #1 on: Tue, 23 August 2022, 07:36:24 »
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.
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Offline fer2d2

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Re: IBM Model M 1996 with Teensy2.0++
« Reply #2 on: Fri, 26 August 2022, 05:29:30 »
Hi!

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

This is the result:







Cheers!
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Offline Tactile

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  • Location: Portland, OR
Re: IBM Model M 1996 with Teensy2.0++
« Reply #3 on: Fri, 26 August 2022, 06:54:23 »
XLNT!  :thumb:

Great job!
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Offline Slywanin

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Re: IBM Model M 1996 with Teensy2.0++
« Reply #4 on: Fri, 30 December 2022, 12:16:42 »
why......

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

 :D
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Offline TomahawkLabs

  • Posts: 93
Re: IBM Model M 1996 with Teensy2.0++
« Reply #5 on: Tue, 03 January 2023, 19:35:34 »
Where did you find your Teensy? I just used my last one and I want one more, but cannot find any.
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Offline fohat.digs

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Re: IBM Model M 1996 with Teensy2.0++
« Reply #6 on: Tue, 03 January 2023, 21:26:51 »
Go to the source :

https://www.pjrc.com/teensy/

Presumably "Out of Stock" is temporary.
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Offline TomahawkLabs

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Re: IBM Model M 1996 with Teensy2.0++
« Reply #7 on: Wed, 04 January 2023, 19:30:36 »
Those have been out of stock for almost 2 years. There was some b stock a while back. It’s deprecated hardware. Just hoping to find a second one for another project.
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Offline fohat.digs

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Re: IBM Model M 1996 with Teensy2.0++
« Reply #8 on: Thu, 05 January 2023, 08:18:12 »
Quote from: TomahawkLabs on Wed, 04 January 2023, 19:30:36

It’s deprecated hardware.


That is most unfortunate. I have a few more "projects" that I was planning to use them in ....
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Cognitive distortions are patterns of thought, typically automatic and unconscious, that cause an inaccurate, negative view of situations, people, and/or events. These include things like jumping to conclusions; black-and-white thinking; negative mental filtering; overgeneralizing; mindreading (incorrectly believing we know what others are thinking, what their motives are); and emotional reasoning (believing that if we are feeling something, or if what we are thinking is associated with a strong emotion, it must be true).
- Scott Jansenn 2024-04-07

Offline TomahawkLabs

  • Posts: 93
Re: IBM Model M 1996 with Teensy2.0++
« Reply #9 on: Thu, 05 January 2023, 21:07:52 »
Guess I will just have to learn how to design a RP2040 board and MicroPy.
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Offline Maledicted

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Re: IBM Model M 1996 with Teensy2.0++
« Reply #10 on: Sat, 07 January 2023, 16:11:22 »
Quote from: TomahawkLabs on Thu, 05 January 2023, 21:07:52
Guess I will just have to learn how to design a RP2040 board and MicroPy.

Do you need the extra pins, or can you just use a Pro Micro? RP2040 is even cheaper than Pro Micros at this point anyway though.
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