Monitor a device by intercepting the EXEC SendIO and DoIO vectors.  This
will give you most of the IO request information for any device.  

 PERMSSN    UID  GID    PACKED    SIZE  RATIO     CRC       STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
[generic]                  897    1541  58.2% -lh5- 4d92 May  6  1987 TDebug/POSTER
[generic]                 4805    9036  53.2% -lh5- 4976 May  6  1987 TDebug/tdebug
[generic]                 2285    5668  40.3% -lh5- 2431 May  6  1987 TDebug/tdebug.c
[generic]                 6289   12473  50.4% -lh5- 3e95 May  6  1987 TDebug/tdebug.uue
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total         4 files   14276   28718  49.7%            May  6  1987