Computer-Printer Communication; Using Graphics Software - Epson FX-1050 User Manual

Using graphics software

The FX is capable of producing finely detailed graphic images. Although
the section on graphics later in this chapter gives specific information on
the graphics commands, the easiest way to take advantage of the FX's
capabilities is with one of the many graphics programs available.
When buying graphics software, always make sure the program has an
option to print on an FX printer. Any program with an option for an FX
printer should give excellent results, using different dot densities to
produce a realistic scale of grays.
Most graphics programs have a printer selection procedure, in which
case you should check the lists on page

Computer-Printer Communication

Your computer communicates with your printer using a standardized set
of numbered codes called ASCII codes (American Standard Code for
Information Interchange). When you press the letter A on the keyboard,
it is translated into the ASCII code for A, transmitted to a peripheral
device such as your computer screen or your printer, and then converted
back into the letter A.
There are ASCII codes for all the letters in the alphabet, both uppercase
and lowercase letters, and for the numbers 0 through 9. The ASCII set of
codes also includes most punctuation marks and some codes that control
printer functions.
In the Command Summary in Chapter 8, each code is expressed three
different ways: as an ASCII character, as a decimal number, and as a
hexadecimal (base
represented as the ASCII character A, the decimal number
hexadecimal number 41. The numbering system you use depends on
your software and your preferences.
All letters, numbers, and punctuation marks are assigned decimal
numbers from
32
than are called control codes, because they control the operation of
32
Using Software and Graphics
number. For example, the uppercase letter A is
16)
through ASCII codes with decimal values of less
255.
to find the proper selection.
4-2
and the
65,
4-5