Epson Apex-80 - Manual (Page 114)

Problem Solution
Strange things print in
graphics mode
Printer freezes in graphics
mode
Can’t get a full page in width
Some systems require a WIDTH
statement. See your system
documentation.
Many computers have problems sending
one or more of the codes between 0 and
13. Avoid any that affect your system if
possible.
Seven-bit computers cannot use the
eighth pin (128). If you have a 7-bit
computer and any of your graphics data
numbers are larger than 127, change the
design so that all numbers are less than
128.
Be sure that no other commands or
carriage returns come between the
graphics command and its data.
The printer expects a certain number of
pin patterns, determined by n1 and n2. It
does not print until the quota is full. Note
that 9-pin graphics mode requires two
bytes for each column of graphics.
Some systems require a WIDTH
statement. See your system
documentation.
Problem Solving and Maintenance c-3