INT 14 - 3com BAPI SERIAL I/O - WRITE BLOCK                                     
	AH = A4h
	CX = length of buffer in bytes
	DH = session ID (00h for external session managment)
	ES:BX -> buffer containing data
Return: AH = return code (00h,01h,03h,07h,0Ah,0Bh) (see #00394)
	CX = number of bytes actually sent
SeeAlso: AH=19h,AH=86h,AH=A0h"BAPI",AH=A5h"BAPI"
                                                                                

INT 14 - Interconnections Inc. TES - HOLD CURRENTLY ACTIVE SESSION              
	AH = A4h
	???
Return: ???
SeeAlso: AH=A3h"TES",AH=A5h"TES"