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SNKB-F1986BF83

IBM 5291 Display Station Keyboard Unit

Part Number
4176191
Type
Model F Terminal Keyboard
Nickname
Bigfoot
OEM
IBM
Switches
IBM capacitive buckling springs
Key Count
83
Original Keycaps
PBT with dye-sublimated legends
Connection
IBM 5291-specific over DA-15 (14P)
Production Date
1986, 26 February
Sound Signature
Modifications
Adapted to USB via an internal Soarer's Controller that acts as the keyboard's CPU (since the IBM 5291 would take this function on instead of the discrete keyboard unit itself). The controller is a Pro Micro clone with its RXLED removed to expose the Arduino equivalent of Teensy's PB0 to gain all the pins needed to interface with the keyboard's mainboard.

More about this type of keyboard...

Variant of a Model F Terminal Keyboard

The so-called "bigfoot" Model F terminal keyboard was a detached variant of the Model F keyboard assembly found inside the IBM 5322 System/23 made especially for the IBM 5291 Display Station and features the IBM 5251 Display Station's beam spring keyboard layout. Looking like an enlarged Model F/XT, the keyboard features extremely enlarged bezels acting as a sort of palm rest and comes with three-setting adjustable feet larger than any other feet found on IBM keyboards.