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<b>Control codes (additional to IBM PC control set)</b>
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ESC = = Select switched character set
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Encoding:
:CHR$(27); "=";
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Function:
:This command selects the printable characters that equal the 7-Bit characters from CHR$(1) to CHR$(127).
:The reception of the command ESC = results in bit 8 to be regarded as 1 for all received characters.
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NUL = = Unselect switched character set
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Encoding:
:CHR$(0);
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Function:
:The reception of the command NUL results in bit 8 to be regarded as 0 for all received characters.