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P/N 1399240 - Model M Keyboard Details & Specs

Bull DPX/20 Keyboard

Known Assembly Part Numbers
1394553
OEM
Lexmark
Earliest Appearance
1995
Original Keycaps
PBT with dye-sublimated legends
Casing Colour
Pearl White
Protocol
IBM scancode set 2
Connection
Grey coiled-style detachable SDL to PS/2 mini-DIN cable
Key Count
101
Form Factor
Full-size
Layout/Language
US ANSI
Additional Notes
Based on an IBM RISC System/6000 Enhanced Keyboard, has Ctrl/Act key in place of the right Ctrl key
Source(s)
Data Last Updated
2022-08-02

More on this type of keyboard...

Variant of a Model M Enhanced Keyboard with Speaker

The Model Ms made for the IBM RT PC and RS/6000 systems were variants of the IBM Enhanced Keyboard featuring an integrated speaker on the underside of the keyboard. The speaker, which occupies a space usually left unfilled on other Enhanced Keyboards, is believed to act as an audible cue when keys as pressed. The speaker is operated by the host system via extra pins in the unique AMP-made connector (RT PC) or the unused pins in a PS/2 plug (RS/6000). For PS/2 variants, the keyboard itself can still be used with standard AT or PS/2 class PCs, however, the speaker cannot be utilised by them without creating an additional circuit to signal the usually unused pins.

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