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4–7Graphics
Plot Data Byte Format
In P–Series Plot Mode, the format is as follows:
•
Each data byte specifies six out of twelve dot columns.
• Using odd dot plot mode, bits 1 to 6 of the data byte address the odd–numbered dot col-
umns;
using even dot plot mode, bits 1 to 6 of the data byte address the even–numbered dot
columns.
• Bit 6 and/or bit 7 of the data byte must be a “1” (or true) bit in the Plot mode.
• Bit 8 of the data byte is not used in the Plot mode and may be either a 1 or 0.
• The
binary equivalent of the plot data bytes must be known to address specific dot positions
accurately.
As
shown in Figure 4–7, a dot is printed at the location addressed by each of bits 1 to 6 in the data byte
that is set (1 or true).
NOTE: Bit or
der in Figur
e 4–7 is r
eversed.
111 1110
BIT
1
BIT
2
BIT
3
BIT
4
BIT
5
BIT
6
BIT
7
BIT
8
ODD DOT PLOT DATA
BYTE
LSB MSB
1357911
NOT
USED
NOT
USED
00 01111
2 4 6 8 10 12
EVEN DOT PLOT DATA
BYTE
BIT
1
BIT
2
BIT
3
BIT
4
BIT
5
BIT
6
BIT
7
BIT
8
LSB MSB
DOT COLUMN #1 OF
NEXT CHARACTER
COLUMN
~
DOT COLUMN
#12 OF PREVIOUS
CHARACTER
COLUMN
NOTE: IN ACTUAL
PRINTING, THESE
TWO ROWS MERGE
TO PRINT
ON
THE
SAME ROW.
NOTE: BIT
6
AND/OR BIT
7
MUST BE “1”
FOR PLOT MODE
~~~~~~~~~~~~~
~~~~~~~~~~~~~~
Figure 4–7. P–Series Plot Data Byte Format