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."