CAUTION:
NOTICE:
System Overview
Keyboards
Keyboards
There are two types of
•PS/2 Keyboard (P/S2 interface)
•ITF Keyboard
Only connect devices that conform to the
Keyboard Differences
Aside from the obvious difference in the appearance of the PS/2 and ITF keyboards due to the arrangement of the keys, there is also a difference in the keys and their output codes. For example, some keys on one keyboard may not exist on the other keyboard. These keys generate codes that may not exist as output from the other keyboard (or may be generated by a different key). Codes that are generated when a key is pressed are called keycodes.
Some applications expect to use keycodes generated by keys existing on one of the keyboards (the ITF keyboard for example). Since the keys do not exist on the other keyboard (the PS/2 keyboard for example), an accommodation must be made if the PS/2 keyboard is to be used. In most cases, it is still possible to use some other key that is equivalent (generates the same keycode from a different keycap). To do this, it is necessary to know which keys are equivalent on the two keyboards. Table 3 compares the equivalent keys of the ITF and PS/2 keyboards.
Keyboard keys not mentioned inTable 3 are the same on both keyboards.
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