3 – 26 Programming
Maximum Graphics Columns Per Line
Graphic’s mode
ESC K 480
(Single Density)
ESC L/ESC Y 960
(Double Density)
ESC Z 1920
(Quadruple Density)
If the value entered is greater than the allowed maximum, the proper
maximum value will automatically be entered.
3. Graphics Data
The last part of the graphics statement contains numeric data that tells
the printer to print dots at specific positions in each column. It is easiest
to lay out your image on graph paper, filling in the squares where you
want a dot to appear. (If you want to use higher density graphics, keep
in mind that the columns will overlap, and remember any restrictions
that may apply.) Then divide the image into strips of eight rows. Each
row will be programmed as a separate LPRINT statement.
Each position in the column has a numeric value as shown in the table
below. Simply add the values of the column positions where you want
dots to appear, then enter the total in your LPRINT statement.
Note: (For people familiar with binary numbers.) Each column is represented by an 8-
bit binary number. A dot represents a 1 and a space is 0; the top dot is the MSB (most
significant bit) and the bottom dot is the LSB (least significant bit.) The bit positions are
shown in the table for reference. You can use the ASCII code chart in Appendix D as a
conversion table.
