Editing IBM Enhanced Keyboard (section)

===1390120===

Entering production in January 1986, this keyboard was associated with certain later models of the IBM PC XT that were announced in April 1986. Its most distinguishing characteristic is its lack of lock lights (the original PC/XT keyboard lacked them too). It attached to the XT with the same sort of detachable DIN 5 connector cable as the [[#1388032|1388032]]. Whilst designed to be compatible with the XT, it was also compatible with the AT (and PS/2) interface, and it is believed that many of the early AT keyboards could interface with the same XT models with which the 1390120 was designed to work.

<gallery widths=250 heights=147>
File:IBM_Model_M_1390120_19860331_front_1280x720.jpg|IBM PC XT Keyboard, Part Number 1390120. Note the lack of lock lights above the numeric keypad.
File:IBM Model M 1390120 19860424 back 1024x576.jpg|Older models like this one have a barcode on the back side label.
</gallery>