HP 3000 Manuals HP 3000 Manuals
DTC/3000 Enhancements
by Stephen Lin--Business Networks Division
The Datacommunications and Terminal Controller (DTC/3000) is a LAN-based
controller for asynchronous access to HP 3000 and non-HP systems, and for
X.25 access to public and private X.25 packet-switching networks. For
asynchronous access, DTC/3000 provides connections to terminals, PCs in
terminal emulation mode, and serial printers.
With this XL Release, DTC/3000 product offers the following Terminal I/O
enhancements for asynchronous devices:
* Fewer NMMGR configuration screens
* More NMMGR configuration profiles
* Flexible Typeahead Echo Mode
NMMGR SCREEN ENHANCEMENT
All Datacomm product configurations are done with the configuration
utility NMMGR. The number of NMMGR screens used to configure a Datacomm
product has been reduced.
Refer to Configuration Systems for Terminals, Printers, and Other Serial
Devices (P/N 32022-90001) for new screen information and the steps
required to configure Terminal I/O or X.25 PAD Support.
NMMGR CONFIGURATION PROFILES
In XL Release 2.1, the maximum number of profiles configurable through
NMMGR was 100 per XL system. In this XL Release, the number is increased
to 256. This will allow you to create more profiles and device classes.
TYPEAHEAD ECHO MODE
Typeahead Mode was provided in XL Release 1.2. Typeahead Mode can be
enabled or disabled dynamically through the CI variable HPTYPEAHEAD on a
per port basis. It also can be configured permanently for a DTC port by
associating a terminal type file with Typeahead Mode enabled with the
port. (A terminal type file can be created or modified with the
Workstation Configuration utility called TTUTIL.)
In this XL Release, an option now exists in Typeahead Mode to echo input
characters only once, or to echo twice as implemented in XL Release 1.2.
This option is on the Control Screen in TTUTIL. An example of the field
follows:
[ ] Typeahead enabled (Y,N)
[ ] Typeahead Echo Mode
0 - Double echo
1 - Single echo
When both Echo and Typeahead Modes are enabled, a choice of "0" will
cause the data to be echoed twice. The first echo occurs when the data
is typed and stored in the typeahead buffer on the DTC. The second echo
occurs when the data is actually used, that is, when the data satisfies a
read and is forwarded to the host for execution. A choice of "1" will
cause the typeahead data to be echoed only once when the data is actually
used.
To use the option, first create a terminal type file with TTUTIL. Then
use NMMGR to designate the terminal type file to a terminal profile and
assign the profile to the ldevs/devices that need the option. Reboot the
system to make the changes take affect.
NOTE Note that the "TERM=" assignment in a hello logon sequence can not
be used to activate Typeahead Echo Mode. It must be configured in
NMMGR. For detailed information on TTUTIL, refer to Customizing
Terminal-Type Files and Printer-Type Files with Workstation
Configurator (P/N 5959-2866).
A simple way to verify that Typeahead Echo Mode is active is to use the
PAUSE command at the MPE XL colon prompt. Enter the PAUSE command with
specified pause time (in seconds) and enter a few CI commands.
Assuming that Echo Mode is enabled, if the commands following the PAUSE
command are visible on the screen, it is in double echo mode. If the
commands are not visible, it is in single echo mode. Either way, when
the pause time expires, the commands will be echoed on the screen when
they are executed. To verify if Echo Mode is enabled, use the CI command
SHOWVAR HPTYPEAHEAD.
Currently, Typeahead Echo Mode is configurable only through terminal type
files. Programmatic control of Typeahead Echo Mode through the
FDEVICECONTROL intrinsic is not part of this enhancement. It will be
available in future releases.