29 lines
804 B
Plaintext
29 lines
804 B
Plaintext
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DEFINITION MODULE Display;
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(*
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Low-level Console Output
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Derived from the Lilith Modula-2 system developed by the
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group of Prof. N. Wirth at ETH Zurich, Switzerland.
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[Private module of the Modula-2 system]
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*)
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EXPORT QUALIFIED Write;
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PROCEDURE Write (ch: CHAR);
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(*- Display a character on the console.
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in: ch character to be displayed.
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The following codes are interpreted:
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System.EOL (36C) = go to beginning of next line
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ASCII.ff (14C) = clear screen and set cursor home
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ASCII.del (177C) = erase the last character on the left
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ASCII.bs (10C) = move 1 character to the left
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ASCII.cr (15C) = go to beginning of current line
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ASCII.lf (12C) = move 1 line down, same column
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Write uses direct console I/O.
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*)
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END Display.
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