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Reference Information (emulation)
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Chapter 5. Reference Information
This chapter provides reference information for the mode to emulate the DEC
VT220 and the SYSTEM ATTACH mode.
Mode to Emulate the DEC VT220
This section provides information that is useful when writing or modifying
application programs that are used with the 3151 in emulation mode. It describes
the use of the Select Screen Format and Down-Line Loading Characters (DRCS)
commands.
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Select Screen Format
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The following four screen formats are available:
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80 columns and 24 rows (1920 characters)
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80 columns and 25 rows (2000 characters)
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132 columns and 24 rows (3168 characters)
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132 columns and 25 rows (3300 characters).
You can select a screen format by using the Select Screen Format or Column
Mode (DECCOLM) command, or through the DISPLAY menu. When this
function is performed, the content of the screen is erased, the scroll region is reset
to full screen, and all line attributes are reset to single-width and single-height.
Chapter 5. Reference Information
5-1
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