h6. [[DeviceFS]] h6(. » [[DeviceFS SWI Calls|SWI Calls]] h6((. » DeviceFS_Threshold h2. DeviceFS_Threshold h5. (SWI &42745) |_<^{width:4em}. Entry | | |<^. R1 |<^. [[DeviceDriver_Entry 0|DeviceFS Stream handle]] | |<^. R2 |<^. Threshold to use, or -1 to read | |_<^{width:4em}. Exit | | |<^. R1 |<^. Preserved | |<^. R2 |<^. Preserved | h4. Use The purpose of this call is to inform [[DeviceFS]] of the threshold value to use on buffered devices. h4. Notes This SWI sets the threshold at which [[DeviceDriver_Entry 8|halt]] and [[DeviceDriver_Entry 8|resume]] are called. h4. See also * [[DeviceDriver_Entry 0|Device Driver Initialise Entry Point]] * [[DeviceDriver_Entry 8|Device Driver Halt Entry Point]] * [[DeviceDriver_Entry 9|Device Driver Resume Entry Point]]