User`s guide

SHOW
PDP 11/23 PLUS Processor
512KB of memory
Extended Instruction Set (EIS)
Memory Management Unit
Parity Memory
60 Hertz System Clock
Device I/O time-out support
System job support
FPU support
DEVICES[:dd]
Displays:
• RT–11 device handlers and their status.
• CSR addresses and vectors.
• Installability information for any device handler that, because of the handler
characteristics or your system configuration, cannot be installed in some
manner on your system. You can obtain this information for a specific device
by including the optional argument dd. The dd variable specifies the two-
letter permanent device mnemonic.
SHOW DEVICES:DU displays additional DU status information. The port
display indicates an invalid port by displaying an asterisk (*) before the port
number. For example, port = *n, where n = 0,1,2,3, indicates that port n was not
installed. If SHOW DEVICES:DU displays port = n, where n = 0,1,2,3, then port
n is installed.
SHOW DEVICES:MU displays MU status information for the PORT and UNIT
of each installed TMSCP controller in the same manner that the DU argument
displays MSCP status information. (Partitioning is invalid with magtapes.)
The SHOW DEVICES command displays the following messages about a device’s
installation status.
Message Meaning
Installed Known to the monitor
nnnnnn Load address of handler
Resident Permanently located in memory
Not installed Not known to the monitor
-Not installed Not known to the monitor and not installed because the
handler special features do not match those of the monitor
Not BSTRAP installable Handler must be installed by the INSTALL
Not KMON installable Handler must be installed at the system boot
Not installable Handler cannot be installed on this system
RT–11 Command Descriptions 303