Table of Contents
Advertisement
Peripheral Devices
Copy The Entire Active Workspace
When the printer is selected as a destination device, you can copy the entire content of the
active workspace to the printer by ((homing up" the cursor and selecting the
COpy ALL
key.
Block terminators are ignored.
From a program executing in a host computer, you copy,- the entire workspace using the
following escape sequence:
EcO
The entire workspace, not just that portion which appears on the screen, is copied from the
display to the printer. Block terminators are ignored.
COMPUTER TO PRINTER DATA TRANSFERS
With the printer selected as a destination device, you can copy up to 256 characters of a data
string from the computer to the printer. The data can be sent in either binary or ASCII form,
depending on the escape sequence used.
Binary Data Transfer
If data is to be transmitted to a printer (or other external device) in binary form, the device
f"i'
must be of a type which accepts binary data. Also, the ENQI ACK form of handshaking must be
used. This means that the computer program which initiates the data transfer must transmit
an ENQ
((5"
in ASCII decimal code) immediately before transmitting the data.
The following escape sequence is used to initiate transfer of a string of binary data:
Ec &p <x>W
This sequence transfers the first
((x"
bytes of the data string, in binary form, to the printer. The
maximum value for
((x"
is 256.
The sequence of events for transmitting five bytes of binary data
((12345")
to an external
device from a program, using the ENQ/ACK handshake, is shown below:
COMPUTER PROGRAM
Ec&p5W
ENG
-------->
-------->
<--------
-------->
TERMINAL
ACK
As an alternative to the
ENQ/ACK
handshake, the program can pause for
3
seconds after
sending the initiating escape code.
6-13
Advertisement
Table of Contents
