h6. [[FilterManager]] h6(. » [[FilterManager SWI Calls|SWI Calls]] h6((. » Filter_DeRegisterPreFilter h2. Filter_DeRegisterPreFilter h5. (SWI &42642) |_<^. Entry | | |<^. R0 |<^. Pointer to zero terminated filter name| |<^. R1 |<^. Address of [[Pre Filter Code]]| |<^. R2 |<^. Value to be passed to R12 | |<^. R3 |<^. Task handle of task to which filter was applied| |_<^. Exit | |<. All registers preserved| h4. Use The purpose of this call is to remove a filter from the list of pre-filters. h4. Notes All values must be the same as those passed to [[Filter_RegisterPreFilter]] h4. See also * [[Filter_DeRegisterPostFilter]] * [[Filter_RegisterPostFilter]] * [[Filter_RegisterPreFilter]] * [[Poll Mask]]