Epson FX-80 User Manual page 316

But the printer also uses the CHR$(9) code to activate horizontal tabu-
lation. The problem is finding a way to sneak the CHR$(9) past the
interface board so that it can be used by the printer.
You can avoid the problem by changing the printer initialization
code to something else; this frees the CHR$(9) for horizontal tabula-
tion. Try this:
PR#l
PRINT CHR$(9)j CHR$(l)
Now the printer will initialize with CHR$(l).
Error Detection
The FX-80 will warn you if certain error conditions exist by sound-
ing the internal bell. Each of the four error conditions has a unique
sound. Listen closely ...
1. A short circuit between the collator and the emitter of the head
transistor produces:
PEE, PEE, PEE, PEE
2. Detection of high voltage produces:
PI, PI, PI, PEE
3. A slave CPU error produces:
PI, PI, PI, . . . PI, PI, PI
4. The paper running out produces:
PI, PI, PI, PI (repeated five times)
Note: Except for paper-out sensing, the bell will sound regardless of
switch settings.
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