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Graphics
COMPATIBILITY MODE
Compatibility Mode allows the terminal to use, with a minimum of reprogramming, graphics
applications programs intended for TEKTRONIX® 4010 and 4014 terminals. The Compatibi-
lity Mode feature extends the number of points you can address on the display screen to either
1024 by 1024 (4010 emulation) or 4096 by 4096 (4014 emulation). This section describes the
features provided by Compatibility Mode.
The terminal operates in one of two submodes while in Compatibility Mode. In Alphanumeric
mode the terminal displays alphanumeric data on the screen as in normal operation. In
Graphics mode the terminal responds to alphanumeric data as vector coordinates. You can
alternate between alphanumeric and graphics modes to display messages, plot graphics
figures, and then display additional messages. Control sequences that direct the operation of
the terminal in Compatibility Mode are listed in Table D-12. These sequences either perform
different functions or are ignored when the terminal is not set for Compatibility Mode.
You turn on Compatibility Mode by selecting one of five operating states. Escape sequences
that control Compatibility Mode begin with
Ec
*
t
and are followed by one or more com-
mands. Refer toTable D-13 for a complete list of Compatibility Mode escape sequences. As in all
other parameterized escape sequences, a capital letter ends the sequence. Figure D-19 con-
tains examples of escape sequences.
Vectors are drawn using the current line type and line drawing mode. By changing applications
programs to send additional escape sequences, you can draw vectors using dotted, dashed, or
other line-types. In general, all of the normal features of the terminal, such as display
enhancements, are available only in the Alphanumeric mode.
Compatibility Mode Configuration
The five operating states for Compatibility Mode--OFF,
SCALED, UNSCAlED, SCl
4014, and
UNSC
40 14--appear in the
GraphCompa t
field in the Terminal Configuration menu. The default
state is OFF. This field can be set programmatically using the
ffEc & s"
and
ffEc
* t " sequences
shown in table D-13. The P, Q, and 4014 straps determine the terminal's mode of operation
after being initialized (power up or full reset). The straps are interpreted as follows:
P
Q
4014
STATE
0
0
X
OFF
0
1
0
UNSCAlED
0
1
1
UNS
4014
1
0
0
SCALED
1
0
1
SCl
4014
1
1
X
OFF
Table D-13 lists the escape sequences that set and clear the P, Q, and 4014 straps.
In addition, when in Compatibility Mode, you can select the following optional capabilities.
® TEKTRONIX is a registered trademark of Tektronix Corporation
D-45
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