INT 60 U - Buffit v3.0 - (NOT A VECTOR!) - INSTALLATION CHECK
Program: Buffit is a shareware scrollback utility by D.T. Hamilton
Notes:  Buffit searches INT 60 through INT 6F for a vector which points at
          the ASCII signature "Buffit  ", and uses the first free vector in
          that range if it is not already installed
        there is a private entry point immediately following the signature
          string, i.e. eight bytes beyond the address pointed at by the
          interrupt

Call private entry point with:
        AH = function
            00h get information and hotkey state
            01h get information and toggle hotkey state
Return: AH = new hotkey state (00h enabled, 01h disabled)
        AL = hotkey scan code
        BH = hotkey shift states
        BL = ??? (01h)
        CX = segment of resident code
        DH = niterrupt number used for signature pointer
        DL = ??? (00h)
        SI = INT 09 handler offset
        DI = INT 21 handler offset
Index:  hotkeys;Buffit

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