INT 21,63 - Get Lead Byte Table (MSDOS 2.25 only)

	See below for information on the Asian INT 21,63 specifications

	AH = 63h
	AL = 00  get address of system lead byte table
	   = 01  set or clear interim console flag
	   = 02  get value of interim console flag
	DL = 00  clear interim console flag (when AL=01)
	   = 01  set interim console flag (when AL=01)

	on return
	AX = error code if CF set
	DS:SI = far pointer to lead byte table (AL=00)
	DL = value of interim console flag (AL=02)

	- available only in MSDOS 2.25
	- provides multiple byte character support
	- function 00, returns the address of system table containing
	  legal lead byte ranges
	- function 01 & 02 set and get the interim console flag which
	  determines whether interim bytes are returned on some console
	  functions
	- all registers except CS:IP and SS:SP may be destroyed

INT 21,63 - Get Lead Byte Table (Asian DOS 3.2+)

	AH = 63h
	AL = 00  get address of Double Byte Character Set (DBCS) lead table
	   = 01  set Hongeul (Korean) input mode
	   = 02  get Hongeul (Korean) input mode
	DL = new keyboard input mode
	   = 00  return completely formed characters only
	   = 01  return partially formed characters also


	on return
	AL = 00 on success
	   = FF if function not supported
	DS:SI = pointer to DBCS table  (function 00)
	DL = current keyboard input mode (function 02)
	   = 00  only completely formed characters are accepted
	   = 01  partially formed characters are accepted


	- available only in Asian MSDOS 3.2+
	- provides Asian multiple byte character support
	- all registers except CS:IP and SS:SP may be destroyed
	- DOS 4.0 returns an empty list