Int 60  U - Buffit V3.0 - (not A Vector!) - Installation Check             [V]

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