INT 62 u - FGDRIVER v4.02 - "FG_MEASURE" - GET DELAY UNITS PER CLOCK TICK
	AX = 0070h
Return: AX = delay units per clock tick (processor-dependent)
Notes:	the FGDRIVER functions are rearranged with each major release, but
	  their parameters do not change (see #03474 at AX=0000h)
	These delay units are used by "FG_STALL" (see AX=00BFh)
SeeAlso: AX=00BFh