Summary - Epson FX-80 User Manual

ABCDEFGHIJKLNNOPQRSTUVNXYZ
ABCDEFGHIJKLMNOPQRSTUVWXYZ
Setting the eighth bit on in line 10 adds 128 to each of the numbers in
line 20; thus it prints italic characters. The < ESC) "
= "
in line 30 effec-
tively subtracts 128 from each of the numbers in line 40, so the second
line prints as the characters from 65 through 90. Line 50 returns all to
normal. Note that the eighth bit stays either on or off Ulltil it is
changed by one of the other two codes.
A second aid that the FX-80 offers to users of 7-bit computers in-
volves the ESCape codes. They have been extended to operate with
the high-order bit turned on. For example, the FX-80 understands
both the normal
<ESC)"E"CHR$(27)CHR$(69)
and the high-order version,
CHR$(27+128)CHR$(69+128)
to mean "enter Emphasized Mode" (adding 128 is the same as setting
the high-order bit on).
So what good does that do you 7-bit'ers? Plenty. It means that if
you tum the eighth bit on for use in one mode, you can thereafter
switch to any mode that can handle numbers from 128 to 255 as pa-
rameters.
Summary
CHR$(8)
<ESC)"
#"
<ESC)"
="
<ESC)") "
<ESC) "R"CHR$(n)
Causes a backspace
Cancels <ESC)"
="
and <ESC)")"
Eighth bit OFF
Eighth bit ON
Selects an international character set,
where n
=
0 through 8:
o
=
USA (ASCII)
1
=
France
3
=
England
5
=
Sweden
7
=
Spain
2
=
Germany
4
=
Denmark
6
=
Italy
8
=
Japan
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