What's Inside The Printer - Epson FX-80 User Manual

• Advanced forms handling capability, including horizontal and ver-
tical tabs, margin select, skip-over-perforation, and variable for-
ward and reverse line feeds.
• User-definable character sets. With this powerful feature you can
create your own alphabets and special symbols.
• High-resolution graphics images with six different densities. Create
your own charts, diagrams, figures, and illustrations.
• International characters.
• Typewriter simulation mode.
• Program debugging mode (hexadecimal echo of codes received
from the computer).
• Fast print speed-160 characters per second for rapid processing of
documents.
• 2K print buffer for smoother operation.
• Epson reliability and quality.
• Built-in friction and tractor feeders with an optional tractor unit for
narrow forms.
• Disposable print head.
• Easy-to-reach switch settings to customize printer features.
In short, the FX-80 is loaded with features that will challenge your
ability to put it to work.
What's Inside the Printer?
The FX-80 printer contains two kinds of internal memory. There is
12K (approximately 12,000 characters) of ROM (Read Only Mem-
ory). This permanent memory contains all the logic required for the
various print features as well as the patterns for the several built-in
character sets. The FX-80 also contains 2K (about 2,000 characters) of
RAM (Random Access Memory). RAM can be used in two different
ways:
1) RAM can be used as a memory "buffer" that stores up to 2K of
text and printer commands as they are received from the" computer.
This frees the computer for further editing while the printer continues
printing.
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