INT 21 - bitFOSS - INSTALLATION CHECK                                           
	AH = 2Bh
	CX = 6269h ('bi')
	DX = 7446h ('tF')
Return: AL = FFh if not installed
	AL = 4Fh ('O') if bitFOSS is installed
	    CX = 5353h ('SS')
	    DX = 494Ch ('IL')
	    ES = resident code segment
	    ES:DI -> identification data
Program: bitFOSS is a revision 5 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. driver
SeeAlso: AH=2Bh/CX=6269h"bitFOSSI",INT 11/AH=BCh
                                                                                

INT 21 - bitFOSSI - INSTALLATION CHECK                                          
	AH = 2Bh
	CX = 6269h ('bi')
	DX = 7449h ('tI')
Return: AL = FFh if not installed
	AL = 53h ('S') if bitFOSSI is installed
	    CX = 444Eh ('DN')
	    DX = 2D46h ('-F')
	    ES = resident code segment
	    ES:DI -> identification data
Program: bitFOSSI is a revision 5 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. driver for ???'s ISDN board
SeeAlso: AH=2Bh/CX=6269h"bitFOSS",INT 11/AH=BCh