Int 2D  - Amis V3.0+ - Determine Chained Interrupts                        [t]

   AL = 04h
   AH = multiplex number for program
   BL = interrupt number (except 2Dh)

Return: AL = status
       00h not implemented (makes TSR non-compliant with specification)
       01h (obsolete) unable to determine
       02h (obsolete) interrupt hooked
       03h (obsolete) interrupt hooked, address returned
       DX:BX -> TSR's interrupt BL handler
       04h list of hooked interrupts returned
       DX:BX -> interrupt hook list (see #2259)
       FFh interrupt not hooked

Notes: BL is ignored if the TSR returns AL=04h; in that case, the caller
     needs to scan the return list rather than making additional calls
     to this function.  If the return is not 00h or 04h, then the caller
     must cycle through the remaining interrupt numbers it wishes to
     check.
   return values 01h through 03h may not be used by AMIS v3.6-compliant
     programs; they are included here solely for compatibility with
     version 3.3, though they were probably never used in any
     implementation
   for return values 01h through 03h, since INT 2D is known to be hooked,
     the resident code need not test for BL=2Dh (to minimize its size),
     and the return value is therefore undefined in that case.
   this function is not valid unless a program is installed on the
     specified multiplex number; use INT 2D/AL=00h to check

See Also: INT 2D/AL=00h,INT 2D/AL=01h,INT 2D/AL=02h,INT 2D/AL=03h,INT 2D/AL=05h

See Also: INT 2D/AL=06h

Format of AMIS interrupt hook list [array]:
Offset Size    Description (Table 2259)
 00h   BYTE    interrupt number (last entry in array is 2Dh)
 01h   WORD    offset within hook list's segment of the interrupt handler
       this will point at the initial short jump of the interrupt
         sharing protocol header (see #2256)

See Also: #2260