INT 11 - BNU FOSSIL(Fido/Opus/Seadog Standard Interface Layer)  A standardized API for performing serial I/O, originally used by the Fido and Opus bulletin- board software and Seadog bulletin-board mailer, but now in wider use. - INSTALLATION CHECK
	AH = BCh
	DX = 1954h
Return: AX = 1954h
	ES:DX -> entry point of driver (instead of INT 14)
SeeAlso: INT 14/AH=04h"FOSSIL(Fido/Opus/Seadog Standard Interface Layer)  A standardized API for performing serial I/O, originally used by the Fido and Opus bulletin- board software and Seadog bulletin-board mailer, but now in wider use."