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Peripheral Devices
PLOTTER CONTROL
Refer to Appendix D for information on control of plotters.
EXTERNAL PRINTER OPERATIONS
With an external printer connected, you may do any of the following operations:
• Perform a line feed (advance the paper one line).
• Perform a form feed (advance the paper to the top of the next page).
• Print one line.
• Print all data displayed on the screen.
• Print all data in the active workspace.
• Select one of three operating modes: Record mode, Log Top mode, or Log Bottom mode.
All of the above printer operations can be initiated either locally, by operator keystrokes, or
remotely, by escape sequences sent from a program operating on a host computer. In both cases,
the external printer must be selected as the destination device for device control commands.
SELECTING THE EXTERNAL PRINTER AS THE "DESTINATION"
DEVICE
To control the printer, you must select it as the destination device for device control com-
mands. This can be done using either the function keys or an escape sequence. To do so using
the function keys, press the following keys, in sequence:
. , device control, "to"
deVices, and
TO EXT DEV.
An asterisk in the
TO EXT DEV
function key label indicates the external printer is selected.
Alternate presses of the key display and delete the asterisk.
Programmatically, the Uto" devices are selected by including one or more ttd" parameters in
the device control escape sequence. The escape sequence to transfer data from the display to
printer is of the form:
Ec&p <a>d <b>d <y>
Where tty" lines of data are transferred from the display to devices tta" and ttb". The values for
tta" and ttb" may be 4 for the printer as specified in the Printer Code
4
entry on the
Terminal Configuration menu, or 6 for the integral printer. Use of the ttd" parameter alters
the selection of the ttt
0
dev ices" accordingly. If no ttd" parameter is specified, then the
currently assigned ttto" device(s) is used.
The tty" value can be either B (copy line), F (copy page), or M (copy alD.
6-7
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