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Model H USB Controller Upgrade (IBM Model M)

Model H USB Controller Upgrade (IBM Model M)

Regular price $34.00 USD
Regular price Sale price $34.00 USD
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Model H USB Controller Upgrade (IBM Model M)

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Note: Firmware has been updated to correct the Scroll/Num Lock key issue and is now using the latest firmware.

This conversion kit allows you to replace your IBM Model M's original internal controller board with a modern USB board. This aims to match the footprint of the original controller and plugs into the original keyboard matrix, but exposes a USB port through the original SDL connector.

Thanks to QMK, the keyboard is fully programmable. It ships with a DFU-style bootloader, which can be programmed over USB.


  • Non-destructive upgrade - just swap the boards
  • Native USB (with type B connector), no adapter required
  • Doesn't require original controller
  • STM32 ARM Processor @ 72MHz with 64kb flash
  • Remappable keys (using QMK configurator)
  • Uses open source QMK firmware
  • Lower power (50 mA typical)
  • Genuine "TE Connectivity Trio-mate" connectors, as used on the original Model M
  • Model H QMK Firmware Source



1 x Model H USB Controller Board (Programmed and ready)

1 x 3D Printed Replacement USB Case Cover



Model H comes in two variants to match different internal connectors.

This upgrade controller supports both variants.

Created by John Hawthorn

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Customer Reviews

Based on 8 reviews
Cristian Gabriel

I am writing this review on my old brand new 28.09.1990 IBM Model M keyboard. So happy with the purchase of this adapter as it gave life to my keyboard that did not work on a modern PC anymore. I tried with three different ps2/usb converters and adapters and nothing worked. Then I found this board. The assembly was very easy and straightforward. Just remove the ribbon connectors and put them in the new board and that is it. Test it out before you put the keyboard back together as the ribbon for the LOCK lights can be but either or. Mine had 2 stages: Either num lock and scroll lock worked fine, but when i pressed caps lock they both went on and off, and the caps lock light didn't work, or with the band switched, caps lock works. but the scroll and num lock lights are reversed. I went with the second option and put the keyboard back together.
Also I had the 8 pin ROW ribbon and I just aligned it to the left where it says ROWS on the board and it works.
Going to look into the hotkey feature so as to make some for the missing windows buttons.
An awesome product that brings new life to an old device!

Hazwan Mohd Jakarni
Please update to new firmware

As per other reviews, the Num Lock and Scroll Lock is switched. This can be solved by flashing a new QMK or VIAL firmware. Maybe KEEBD needs to update it before shipping it to customers. Other than that, it's great!!!

Patrick Pennell
Model M in the 21st century

Fast shipping to the United States, easy to install, and worked out of the box, except the Num Lock and Scroll Lock LEDs are reversed. Not a big deal at all as the firmware can be flashed to fix if necessary, I don't care enough to open the keyboard case back up.

Chris Read
Plug and play

Everything works well out of the box so to speak. Only issue is the num and scroll lock lights are reversed as shipped

V. Banh
Plug and Play, gives my Model M new life

No more 10ft long coiled P/S2 cable! This upgrade is a drop in replacement for the original board. The only downside is that the right side of the board doesn't have anything to hold it down, so I had to some some double sided tape. My scroll lock and numpad LEDs are reversed, but otherwise no major issues.