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AX = 4BEEh
Return:
AX = status 1234h grab was successful 2345h failed (INT 21 grabbed previously)
Program: F-DRIVER.SYS is part of the shareware F-PROT virus/trojan protection package by Fridrik Skulason
Note: When called the first time, this function moves the INT 21 monitoring code from its original location in the INT 21 chain to be the first thing called by INT 21. This is the mechanism used by F-NET.
See Also: INT 2F/AX=4653h/CX=0002h - INT 2F/AX=4653h/CX=0007h
Category: Virus/Antivirus - Int 21h - F
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