HP 3000 Manuals HP 3000 Manuals
HP ALLBASE/4GL Terminals
HP ALLBASE/4GL runs on most HP TERM0 terminals supported under the MPE/iX
operating system. It supports all the standard features of these
terminals such as function keys and special editing keys. Depending on
your terminal type, HP ALLBASE/4GL also makes use of the terminal's line
drawing, color, and touchscreen capabilities.
HP ALLBASE/4GL Terminal Initialization
At the start of a session, HP ALLBASE/4GL uses the HP4TERM MPE-XL
variable to establish the terminal type and capabilities. HP ALLBASE/4GL
uses a support file for your terminal to determine how to drive it. If
HP ALLBASE/4GL cannot find the terminal support file, an error message is
displayed and HP ALLBASE/4GL terminates.
In general, the value of the HP4TERM variable should be set to the type
of terminal you are using. For example, if you are using an HP 2392a
terminal, you should set the HP4TERM variable with the following command:
SETVAR HP4TERM "HP2392A"
If required, you can set the HP4TERM variable in a logon UDC
(user-defined command). If the HP4TERM variable is not set, the standard
start-up command file for HP ALLBASE/4GL, HP4GLR, assumes a default value
of HP. Refer to your HP ALLBASE/4GL support service for more information
about the HP4TERM variable.
System Character Sets
HP ALLBASE/4GL supports the HP roman8 extended character set. To use
eight-bit characters, your terminal must support the roman8 character set
and must be in eight-bit mode.
HP ALLBASE/4GL replaces any line drawing characters with equivalent ASCII
characters, if you are using a terminal that doesn't have line drawing
capabilities.
Using a Touchscreen Terminal
If you want to use touchscreen operation, make sure that the terminal is
in touch mode before you start HP ALLBASE/4GL. You can turn touch off at
any time while HP ALLBASE/4GL is running, but you cannot turn touch on
again. If you do, touch operation may not work reliably.