MSB
LSB
MSB
LSB
MSB
LSB
00011001 -25:D
01010101 - 85:D
2
01010000 - 8O:D
3
MSB
= Most significant bit
LSB = Least significant bit
Figure 5-4. Data bytes for
-he first column of a new capital A
You’ve seen how to design a character by laying out the dots
on a grid, translating the dots to binary information, and then
converting the binary numbers to decimal equivalents. The next
(and final) step in defining a character is to send this information
to the printer.
Sending information to the SQ-2000
The SQ-2000 command to define characters is one of the more
complex in its repertoire. The format of the command is this:
<ESC> “&” <NUL> nl n2 data
The <ESC> “&" is simple enough; that’s a format you should
be quite familiar with by now. The <NUL> (which is ASCII
code 0) allows for future enhancements. At this time it is always
ASCII code 0.
With the SQ-2000, you can define many characters with a sin-
gle command. The n1 and n2 bytes are used to specify a range of
ASCII codes for the characters you will define. You then have to
provide character definition data for all of the characters in that
range to follow.
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