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2.2.8
Device Configuration
Most devices support user configuration. The general forms of the configuration commands are:
SET {<switch> ...} <device> <option>{,<option> ...}
SET {<switch> ...} <unit> <option>{,<option> ...}
The options available and applicable switches are described in the individual device descriptions below.
2.2.9
Enabling and Disabling Devices
All devices other than the CPU and TTY may be disabled or enabled. Disabling a device simulates removing the
associated accessory or interface from the system chassis. To disable or enable a device, use:
Command
Action
SET <device> DISABLED
Disable the device
SET <device> ENABLED
Enable the device
For devices that use two interface cards, enabling or disabling either card also enables or disables the other card.
For example, entering
SET DPC DISABLED
to disable the DPC interface also disables the DPD interface.
Devices that consist of multiple addressable units connected to a controller allow the units to be individually
disabled or enabled. Disabling simulates disconnecting the associated unit from the controller. The commands to
disable or enable a unit are:
Command
Action
SET <unit> DISABLED
Disable the unit
SET <unit> ENABLED
Enable the unit
Each of the above command options is replicated in the option tables of the devices to which they apply.
2.2.10 I/O Interface Select Code Assignments
HP hardware I/O interfaces receive their select code assignments from the CPU backplane slots into which they
are plugged. The first I/O slot corresponds to select code 10 octal and has the highest interrupt priority, with priority
decreasing with increasing select code number. Empty slots may not exist between interface cards; if all interfaces
are not in contiguous slots, HP 12777A Priority Jumper Cards must be installed in the unused slots.
A device’s select code may be set with the
SET <dev> SC=<n>
command. The valid range of select code values
is 10-77 octal. The current select code assignment for a device may be displayed with the
SHOW <dev> SC
command. For example:
SET MSC SC=26
SHOW PTR SC
