h6. [[Programmer's Reference Manuals]] h6(. » [[Service Calls]] h6((. » Service_UKCommand h2. Service_UKCommand h5. (Service &04) |_<^{width:4em}. Entry | | |<^. R0 |<^. Pointer to command| |<^. R1 |<^. 4 (&04)| |_<^{width:4em}. Exit | | |/2<^. R0 |<^. Preserved to pass on, else | |<^. 0 if command successful, else pointer to error | |/2<^. R1 |<^. Preserved to pass on, else| |<^. 0 (to claim service)| h4. Use This service is issued when a command is unknown. h4. Notes This service is issued when a command is unknown, before the filing system is called to attempt to 'run' the command (See [[OS_FSControl 4]]). NetFS uses this service to implement file server commands. Use the [[Module Command Table|command table]] in a Relocatable Module if possible to implement new *Commands. h4. See also * [[OS_FSControl 4]] * [[Module Format]] * [[Service Calls]]