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For most graphics, you will want to change to 7 -dot line
spacing if you are using a 7-bit system and 8-dot line
spacing if you are using an 8-bit system. Refer to the
Paper Feed Commands explained earlier in this section.
To enter Graphics Mode using any of the command se-
quences, the high-order bit must be "OFF." For 7-bit sys-
tems, this means sending the <ESC>= command if you
encounter difficulty in entering Graphics Mode.
Any "Enter Graphics Mode" command causes a buffer
dump to the printer so that any text is not lost. The Master
Reset Code, if issued at the end of a graphics program,
will not affect the graphics data but may cause any text
following the graphics program to be lost. Plot mode
data and print data will not print on the same line
accurately.
Some systems may not allow use of low ASCII codes
0-31. You will need to design around this problem, use
other numbers with similar dot patterns or POKE codes
directly to the printer. Check your system documentation
for assistance.
A command called Variable-Density Graphics Mode is
\
provided to switch from one dot density to another while
remaining in Graphics Mode.
A Width Statement may be required by some computer
systems to prevent the printer from sending a <CR> be-
fore a graphics line is completed (especially if it is wide
graphics pattern such as Double or Quadruple-Density dot
patterns). Consult your system documentation for the ap-
propriate Width. Statement format for your computer.
NOTE: The difference in dot size and density between
the Epson printer and the laser printer will condense
graphics. Circular shapes will appear slightly elon-
gated when printed on the laser printer •
• SELECT SINGLE-DENSITY GRAPHICS MODE places
the printer in Graphics Mode and specifies the num-
ber of columns to be reserved for graphics data.
E-34
Appendix E
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