Editing IBM Model F (section)

===IBM Personal Computer AT keyboard ===
The Personal Computer Advanced Technology (PC AT), released in 1984, was the successor to the IBM PC and XT. Its revamped design was probably the final Model F keyboard design before the first Model M's appeared later that year. The layout was modified to address criticisms of the earlier PC keyboard, and somewhat resembled the layout of the IBM Displaywriter. The communications protocol between keyboard and computer was also redesigned, with bidirectional signals supporting lock lights. Despite its incompatibility with the older PC keyboard, the PC AT used the same DIN-5 connector. The AT keyboard protocol became standard, and is compatible with that of PS/2 keyboards, enabling it to be used with PS/2 connections via a simple DIN-to-PS/2 adapter. The US layout variant has the part number '''6450200'''.

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File:IBM Model F AT.jpg|IBM PC AT keyboard.
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