Epson MX-82 Manuale Utente
2. Definitions of Some Terms Often Used
Before looking at the printer in detail, some terms should be defined first so that you
can understand them more easily and in less time.
They are;
* ASCII code
* Escape codes
* “+” symbol
* 2, D and H
* Escape codes
* “+” symbol
* 2, D and H
If you are already familiar with the above terms, skip these paragraphs.
(1) ASCII code
Characters in computer systems are represented by groups of bits. The various
groups of bits that represent the set of characters that are the “alphabet” of any
given system are called a “coding system”, or simply “code”.
given system are called a “coding system”, or simply “code”.
Codes for representing the information vary in relation to both the number of bits
used to define a single character in the assignment of bit patterns to each parti-
cular character.
In US ASCII (The United States of America Standard Code for Information Inter-
used to define a single character in the assignment of bit patterns to each parti-
cular character.
In US ASCII (The United States of America Standard Code for Information Inter-
change) code the bit group
represents the character
“A”. The sending and receiving equipment must be programmed to acknow-
ledge the code used in computer systems.
The MX-82 has 96 character set and control codes. In addition, it has an inter-
naitonal character set as shown in a previous chapter. Those characters are put
in some addresses of the ASCII code table instead of the standard characters.
in some addresses of the ASCII code table instead of the standard characters.
And those can be accessed by a particular control code or the DIP switch.
Alphabets, numbers and special symbols are addressed from
Alphabets, numbers and special symbols are addressed from
to
E
H
and from
H
to FE
H
.
So same characters are put in two differ-
ent addresses. The selection of which one to use is up to you if your machine
has an 8-bit data bus line.
(2) Escape codes
In a lot of control codes that the MX-82 has, you might be confused by the word
“ESCAPE”.
Some alphabetical letters and some numbers follow it. Each of them causes a
special function to the printer, i.e.
(a) To format a sentence.
(b) To do emphasized printing.
(c) To select paper end detector programmably.
(d) To set column length.
(e) To select an international character set.
Some alphabetical letters and some numbers follow it. Each of them causes a
special function to the printer, i.e.
(a) To format a sentence.
(b) To do emphasized printing.
(c) To select paper end detector programmably.
(d) To set column length.
(e) To select an international character set.
(f) Others.
Generally, printer control codes, especially like “ESCAPE”, are not standardized.
Every computer and printer manufacturer applies its own meaning to such
codes.
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