Library /sys$common/syshlp/sysgen.hlb SHOW, /DEVICE, Description  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    The SHOW/DEVICE command specifies that the following information
    be displayed about the specified device driver:

    Driver   Name of the driver
    Start    Starting address of the driver
    End      Ending address of the driver
    Dev      Name of each device connected to the driver
    DDB      Address of the device's device data block
    CRB      Address of the device's channel request block
    IDB      Address of the device's interrupt dispatch block
    Unit     Number of each unit on the device
    UCB      Address of each unit's unit control block

    By default, if you omit the driver name, information is displayed
    for all device drivers loaded into the system.