Understanding Control Code Definitions; I/O Buffer; Print Image Buffer; Special Notations - Intermec 6822P User Manual

Chapter 4 — Control Code Definitions

Understanding Control Code Definitions

I/O Buffer

Print Image Buffer

Special Notations

Special Notations
Notation Description
(0) Used in the ASCII column of any of the Format definitions, indicates that its value can
only be zero (and not the character "0"). For example: Select Top-Down Printing ESC
US (0).
(1) Used in the ASCII column of any of the Format definitions, indicates that its value can
only be one (and not the character "1"). For example: Select Bottom-Up Printing ESC
US (1).
* When a number (at the end of an escape sequence) is marked with an asterisk, then
either the value corresponding to that number or the value of the string character can be
used for that number. For example, if 1* is shown, then either the value (1), or the value
of the string character (decimal: 49, hex: 31) can be used.
T
NUL he NUL character is represented in the Dec column as 0, in the Hex column as 00, and
in the ASCII column as NUL.
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All characters and control codes received by the printer are stored in this
buffer. Characters and controls codes are read from this buffer and acted
upon to form the print buffer. Characters are removed from the I/O
buffer as they are processed.
All characters go through this buffer on their way to the printed page.
This buffer contains the graphic image of the dots to print, from which
characters are rendered. It is cleared when its contents are printed.
The following information defines notations included in the format
definitions of the escape sequences, throughout this section.
6820 Series 80-Column Printer User's Manual