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P/N 1397507

IBM Personal System/2 Host Connected Keyboard

Type
Model M Type IV 122-key Terminal Emulator Keyboard
Nickname
Battlecruiser
OEM
IBM
Earliest Appearance
1991
Original Keycaps
PBT with dye-sublimated legends
Casing Colour
Pearl White
Connection
Cable
Cable
Grey coiled detachable SDL to PS/2
Key Count
122
Form Factor
120%
Layout/Language
Italian ISO
Data Last Updated
2021-10-20

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Variant of a Model M Type IV 122-key Terminal Emulator Keyboard
Variant of a Model M Type IV 122-key Terminal Emulator Keyboard
Variant of a Model M Type IV 122-key Terminal Emulator Keyboard

The Type IV 122-key Model M Function Key Keyboard is a version of the Type III designed to be natively compatible with PCs to serve in terminal emulation roles. Officially called the IBM Personal System/2 Host Connected Keyboard, Type IVs were relatively rare but for a long time were the only 122-key Model Ms easily capable of modern usage until Soarer's Converter became widespread. Visually, Type IVs look like Type IIIs except all IBM-branded versions had lock-light LEDs as standard and come with modular SDL connections capable of accepting an AT or PS/2 plug cable. IBM also started a practice producing Type IVs under third-party branding to companies that offer terminal emulation services, which Unicomp continues to do to this day. Unicomp also produces a version of the Type IV for consumer usage called the Unicomp PC-122. Like the Type IIIs, the 24-key function key block was only labelled with an "Fxx" nomenclature.

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