Category: serial I/O

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 driver
SeeAlso: AH=2Bh/CX=6269h"bitFOSSI",INT 11/AH=BCh