Column Reservation Numbers - Epson LQ-850 User Manual

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Column reservation numbers

The graphics command requires more than one number to specify
how many columns to reserve because one line can use thousands of
columns, but the LQ does not use numbers larger than 255
(decimal). Therefore, the graphics mode command uses two
numbers for reserving columns.
To figure nl and n2, divide the total number of columns by 256.
The result is n2; the remainder is nl. Since the command is set up
for two numbers, you must supply two even if you need only one.
When you need fewer than 256 columns, just make nl the number
of columns you are reserving and make n2 a zero.
Graphics
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