INT 2F - DOS 3.3+ KEYB.COM - SET KEYBOARD CODE PAGE                             
	AX = AD81h
	BX = code page (see #01757 at INT 21/AX=6601h)
Return: CF set on error
	    AX = 0001h (code page not available)
	CF clear if successful
Notes:	called by DISPLAY.SYS
	this function was undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.).	 Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated. prior to the release of DOS 5.0
SeeAlso: AX=AD80h,AX=AD82h