INT 5C C - TI Professional PCIBM PC - KEYBOARD PAUSE KEY VECTOR
	AX = 0100h
	CF clear
Return: CF clear
	    AX = keystroke to be placed into keyboard buffer
	CF set
	    AX ignored
Desc:	toggle a pause flag which is checked by the CRT Device Service Routine
	  (see INT 49/AH=01h"TI") and causes it to temporarily halt the
	  machine on the next video-related function (until a key is pressed)
SeeAlso: INT 09"IRQ1",INT 4A/AH=00h"TI",INT 59"TI Professional"
SeeAlso: INT 5B"TI Professional",INT 5D"TI Professional"
SeeAlso: INT 5E"TI Professional",INT 5F"TI Professional"