SNKB-M1995-52P-101
| Full Name | IBM 101-Key Keyboard with 25mm Trackball - PS Style |
| Part NumberPart Number The number used to describe this keyboard's specific release; usually specific for a target region, language or SKU, etc. |
92G7455 |
| TypeType A designation from my own type naming scheme used to categorise this keyboard with or from others by their common features and market intent but may/may not be derived from official names. |
Model M5-2 Trackball Keyboard |
| KeyswitchesKeyswitches The name of the known switching mechanism that lies under this keyboard's keys. |
IBM membrane buckling springs |
| Original KeycapsOriginal Keycaps The keyboard's original keycaps' material and text/symbol printing technique. |
PBT with dye-sublimated legends |
| FeetFeet The style of this keyboard's flip-out or extendable feet. If applicable, this may also state how many levels of height adjustment are available and whether the feet could be rubberised. |
Single-setting flip-out feet |
| ProtocolProtocol The protocol(s) this keyboard can use to speak to the host computer (eg, scancode sets). |
IBM Mode 2 (scancode set 2) |
| ConnectionConnection The keyboard-to-host connection. This is could be a description of a cable (its colour, whether its coiled, whether its detachable, and what connector is at its end) or the name of a wireless technology. |
Grey coiled-style detachable 6-pin SDL to dual 6-pin mini-DIN PS/2 cable |
| Form FactorForm Factor The standardised or universally acknowledged name for this keyboard's layout form factor. |
Full-size |
| Built-In MouseBuilt-In Mouse Possible pointing devices this keyboard could carry. This could be a brand name, name of the sensor technology behind it, or a generic description in lieu of the former details. |
25mm trackball |
| Production Date | 1995-05-05 |
| Acquisition Date | 2020-07-30 |
About this keyboard type
The Model M5-2 is one of two variants of the Enhanced Keyboard featuring an integrated trackball pointing device attachment, along with the M5-1. The M5-2 uses a 25mm trackball placed on the top-left corner of the keyboard case and features eight mouse buttons; two for left and right click and two for left and right stepped-click, with both pairs repeated on the back-side of the trackball module. Unlike the M5-1, the M5-2 has remained in production and continues to be produced by Unicomp as the Unicomp Classic Trackball Keyboard (also previously called "On-The-Ball"). Collectively, the M5s were the last introduced Model M variants to feature a modular SDL connection. However, Unicomp has since moved the M5-2 to a fixed cable design.
