Epson FX-80 Operation Manual page 56

Two kinds of data are stored in the input buffer: print data and control codes. Print
data is then sent to the print buffer. This data is printed when a print execution
( control code such as CR is input or when the print buffer becomes full.
\
Since the input buffer secures 2k bytes of RAM area, the host computer begins its
next job as soon as all the data has been output to the printer and functions
irrespective of whether or not the printer is printing.
NOTE:
This function cannot be used simultaneously with the definition of download
characters.
-NOTICE-
For convenience' sake, program examples in this manual have been written in
one version of Microsoft BASIC.
For details of BASIC, refer to the reference manual of your host computer.
BASIC itself is different depending on the specifications of the host computer
and there are versions in which certain codes (such as CHR$(9) and
CHR$(13)) cannot be sent to the printer.
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