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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 #02571) 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 02571) 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 #02568)
See Also: #02572
Category: TSR Libraries - Int 2Dh - A
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