Configuring Systems for Terminals, Printers, and Other Serial Devices (32022-90051)

178 Chapter9
Describing Asynchronous Devices
How Operation Modes Set Functionality
Block mode applications do not prevent the system console from
printing received messages. Such messages can cause data on block
mode screens to be overwritten or lost. Because of this, block mode
applications should not be run on the console.
Some console functionality can be given to the logical console. The
system console can “pass” console functionality (except
[CTRL]-A)toany
other user; a user with system manager capability can “grab” the
console by issuing the CONSOLE command.
The logical console can receive messages sent to the system console, but
it cannot execute console commands that require the console attention
character (
[CTRL]-A). When a logical console is used, the system console
can still execute
[CTRL]-A commands. Refer to “Session-Accepting
Devices” later in this chapter for more information on the logical
console.
The logical console cannot be assigned to:
• Devices configured with switching enabled.
• Devices connected through a PAD.
• Devices connected through Telnet/iX.
HP-PB Console Support
HP Precision Bus (HP-PB) provides console support for some models of
the HP 3000 Series 900 family. It is supported by the SCSI/Console
LAN Card. This card provides two serial ports for remote and session
activity. HP 3000 Series 9X8 systems have a third port available for a
UPS device connection.
The first two serial ports only support the 239X and 700/9X terminals
and emulators with Terminal Type 10. They do not support the
following:
• Set XOFF timer
• Set block mode alert character
• Set Flow Control characters (XON/XOFF)
• Set form feed character
• Enable or disable form feed
• Set termtype file
• FDEVICECONTROL intrinsics
In addition, the console port does not support:
• Set parity
• Set speed
• Binary mode