Genicom 5000 Series, Programmer'S Manual, Page: 206 / 314

Chapter 8. PPL3 Plus Emulation GEK-00029B
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the ">" character (3E) at the beginning of a parameter string indicates
the presence of Digital private parameters.
If the ":" (3AH), "<" (3C), or the "=" (3D) characters are received during
the processing of a parameter string, or if the ">" or "?" characters are
received after the first character of a parameter string, the string will
be ignored.
I: Intermediate characters
received after and ESC and should be in
the range of 20H to 2FH. No more than 1 intermediate character is
permitted. If more than one intermediate character is received before
the final character, the event is noted and the entire sequence is
ignored.
F:
A
final character
is in the range of 40H to 7EH. It indicates the
end of an escape sequence. The intermediate characters (if any) and
the final character, taken together, define the function of the
sequence.
Parameter Values Within Control Sequences
Parameter values are either numeric values or selection indices.
Numeric values typically specify a distance or a quantity pertaining to
a control function. Selective parameters are interpreted as specifying
a choice from an available list for a parameter. Parameter values
must be unsigned digits. Leading zeroes are permitted, but ignored.
If no value is received for a parameter, a value of zero is assumed.
The maximum value for a parameter is the greatest value needed by
any supported control sequence. In a PPL III compliant printer, the
maximum value is the maximum paper size expressed in centipoints
(1/7200-inch). For example, if a printer supports 21-inch paper, the
maximum parameter size would be 21x7200=151,200 centipoints.
If multiple parameters appear in a control sequence, they must be
separated by semi-colons (";"). A maximum of 16 parameters is
allowed. If more are received, only the first 16 are evaluated.
Additional parameters are ignored, but do not cause the sequence to
be invalid.