Epson MX-82 Operation Manual page 74

4.1 Normal-density bit image mode setting by ESC K + nl + nz
To convert the printer's operation mode from Text to Normal-density Bit Image, the
"ESC K + nl + nz" code must be input. (Here, the sign "+" is inserted for the purpose
of legibility only and should not be input in actual operation.) Namely, when ESC
and K (< 4B>
H
the data following the "ESC K" as the bit image data. nl and nz are the hexadecimal
numbers each consisting of 2 digits which define the amount of the bit image data
to be transferred.
In the normal-density bit image processing, the maximum number of dot positions
printable per line is 576. Therefore, the values of ni and nz specified in excess of
576 dot positions are ignored and printing of the bit image data after the 576th dot
position is not guaranteed.
Mixing of text data and bit image data is possible on the same line.
NOTE: Assign values to nr and nz, respectively as follows.
As shown above, nl is set hexadecimally as low-order bytes and nz as high-order
byte.
(Ex. 1) Input data
Text (20 characters)
20 characters in text mode correspond to 120 bit-image positions (20 x 6 - 120).
So the remaining printable positions in Bit-image mode are 456 (576 - 120 - 456).
If 576 data are input as bit-image mode characters, the first 456 data can be printed
but the remaining 120 data are ignored and thus not printed.
(Ex. 2) Input data
) codes and data ni and nz are input, the Printer recognizes
H
ESC K
576 bit-image positions
- 6 8 -
n = 576 Bit-image data
Next data