Intermec EasyCoder 4100, User Manual

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4100 Bar Code Label Printer User's Manual
Helvitica condensed 9 pt italic
Co d e 39 18 p t
Diamond Graphic
Here is an example of what the graphic looks like when incorporated into a
format, enlarged, and then printed.
4100-23
Six Bits Per Byte
Six bits per byte format is a much more compact format than one bit per byte.
For graphics, six bits per byte means that you can download large graphics
more quickly when the printer is in Advanced mode rather than 86XX
Emulation mode.
The arrangement of the bits is very important in this format. Every byte is
composed of eight bits (0-7), but only bits 0-5 are used to map the image.
Bit 6 (the 7th bit) must always be set to 1 so data can be downloaded to the
printer. Bit 7 (the 8th bit) is reserved for parity and compatibility on 7-bit hosts.
Graphics like the previous one bit per byte (diamond) bitmap example can be
downloaded in six bit per byte format in the following way.
1. Draw the graphic on graph paper.
2. Change the graph paper drawing into a pattern of 1‘s and 0‘s.
3. Starting from the top row, divide each vertical column into groups of six
digits. (If the bottom group has less than 6 digits, add 0s to this group until it
also has six.) The six digits in each group are the six bits that will be
downloaded in a byte of data. The top digit of each group is bit 0, the bottom
digit is bit 5.