INT 62 u - FGDRIVER v4.02 - "FG_WAITFOR" - DELAY FOR SPECIFIED DURATION
	AX = 00DDh
	BX = duration in clock ticks
Return: after delay elapses
Note:	the FGDRIVER functions are rearranged with each major release, but
	  their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=00BFh,INT 1A/AX=FF01h