INT 21 - DOS 2+ - GET FILE'S LAST-WRITTEN DATE AND TIME                         
	AX = 5700h
	BX = file handle
Return: CF clear if successful
	    CX = file's time (see #01665)
	    DX = file's date (see #01666)
	CF set on error
	    AX = error code (01h,06h) (see #01680)
Note:	under DR DOS 3.41 and 5.0, this function returns 0 (no date/time) for
	  character devices; MS-DOS returns date and time of opening
SeeAlso: AX=5701h,AX=5704h"Windows95"


Bitfields for file time:
Bit(s)	Description	(Table 01665)
 15-11	hours (0-23)
 10-5	minutes
 4-0	seconds/2


Bitfields for file date:
Bit(s)	Description	(Table 01666)
 15-9	year - 1980
 8-5	month
 4-0	day