Special Handling
1.
System Reset
The combination of ALT-CTRL-DEL will result in the keyboard routine initiating the equivalent of a system
reset/reboot.
2.
System Set Up
The combination of ALT-CTRL-INS will result in the keyboard routine displaying the system default values.
In
relation to CRT or LCD selection, the combinations of ALT-CTRL-F1 1 (CRT) and ALT-CTRL-F12 (LCD)
will be valid.
NOTE:
To press F11 and F12 keys are not equal to press SHIFT F1 and F2.
3.
Break
The combination of CTRL SCROLL-LOCK will result in the keyboard routine signaling interrupt- 1A. Also, the
extended characters (AL
=
OOH, AH
=
OOH)
will be returned.
NOTE:
It is
up
to the system or application initialization code to change the interrupt vector in order to support
an actual “break” function.
4.
Pause
The combination of CTRL NUM-LOCK will cause the keyboard interrupt routine to loop, waiting for any key
except NUM-LOCK to be pressed.
4-29
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