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Author Topic: IBM Model M 1996 with Teensy2.0++  (Read 8565 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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REΛLFORCE

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

  • Posts: 1436
  • 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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REΛLFORCE

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: 136
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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How the hell or why did you become a DEMO-crat?” He asked.
“Long story, but it started with Nixon, then I was educated and know history as the Republicans are all about getting power to exploit it to their benefit, while Democratic politicians, for the most part, are for distributing things more equitably. I’ll finish with the overwhelming sociological and psychological evidence in studies that identify that conservatives see the world through inherent inequity where the elite or those who seek to be elite are superior to the commoners, and it is they who should lead. At the same time, liberals look at the world as inequality and seek to make the world more equitable, and that all should be represented. Ultimately, conservatives trust those in authority, while liberals inherently distrust those in authority to take advantage for themselves or their constituency.”
He looks up and says, “No one ever explained that to me, and then asks, “If **** Cheney thinks that Trump is that bad, then it's not about DEMO-crats vs Republicans, is it.”
I resume walking and then say, “Hey, you got it; it's the Democratic and old Republican parties versus Trumpism, which is American fascism aided by the Russians.”
- RWN 2024-09008

Offline TomahawkLabs

  • Posts: 136
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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Always looking for Alps SKCM/SKCL switches. Feel free to DM.
AMD 5600x | RTX3080 | 2x 1TB NVME + 4x 4TB HDD | B550M Pro-P | 32GB RAM | RM850x | Node 804 | Schiit Modius/Magnius + Audeze LCD-2 | 2x Dell S3422DWG
GMMK 1 Full Size Barebones | Zealio 67g ; Apple M3501 handwired | Alps SKCM Damped Cream
SA: Camping

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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