(v13) ioctl_call provide arbitrarily extended functionality

This page applies to Harlequin v13.1r0 and later; and to Harlequin Core but not Harlequin MultiRIP

TEXT

  int32 ioctl_call ( DEVICELIST *dev,
  DEVICE_FILEDESCRIPTOR descriptor,
  int32 opcode,
  intptr_t arg
  );

This function provides for arbitrary, extended functionality to be implemented in certain device types.