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

Program: Buffit is a shareware scrollback utility by D.T. Hamilton
Range: INT 60 to INT 6F, selected by searching for first free vector

Notes: the Buffit installation check consists of testing whether the
     interrupt vector points at the ASCII signature "Buffit  "
   there is a private entry point (see #2938) immediately following the
     signature string, i.e. eight bytes beyond the address pointed at
     by the interrupt vector

(Table 2938)
Call Buffit 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 (see #0005)
   BH = hotkey shift states
   BL = ??? (01h)
   CX = segment of resident code
   DH = interrupt number used for signature pointer
   DL = ??? (00h)
   SI = INT 09 handler offset
   DI = INT 21 handler offset
Index: hotkeys;Buffit