Editing IBM 3270 PC (section)

== Keyboard ==

The defining accessory of the 3270 PC family is the '''IBM 5271 Keyboard Element''' — '''IBM part 6110344'''. It is the '''122-key Model F''' '''terminal keyboard:'''

* '''24 PF (Program Function) keys'''.
* '''Weight: 9.3 lb''' (much heavier than a standard PC keyboard).
* '''AT protocol''', scan code set 3.
* First announced October 1983; shipped Q1 1984.<ref name="kbwiki">[https://sharktastica.co.uk/wiki/ibm-model-f sharktastica.co.uk &mdash; IBM Model F] and [https://deskthority.net/wiki/IBM_Model_F_122-key deskthority &mdash; IBM Model F 122-key]. Community keyboard references; the source for the 9.3 lb weight and the scan-code-set-3 behaviour. </ref> IBM's own parts catalogue lists keyboard part '''6110344''' for the 5271 in Figure 7 of the maintenance manual.<ref name="mi3270" />

The keyboard connects to the '''keyboard adapter dongle''' — a small cable that splits a DE-9 on the keyboard controller card into two 5-pin DIN connectors (one for the 3270 keyboard, one passing through to the planar XT keyboard socket).

A plain XT 83-key keyboard works but produces POST error '''302''' (press F1 to continue). P-model variants use the 101-key Enhanced AT-style keyboard instead.

[[File:IBM Model F 122 key keyboard.jpg|center|thumb|480px|The IBM 122-key Model F keyboard (IBM part 6110344) — the 5271 Keyboard Element used on all 3270 PC family machines. (Image: Wikimedia Commons, CC BY-SA 4.0)]]