Printronix P3000 Series manual ~~~ ~~~~~~~~~~~

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 order in Figure 4–7 is reversed.

EVEN DOT PLOT DATA BYTE

NOTE: BIT 6

AND/OR BIT 7

MUST BE “1”

FOR PLOT MODE

LSB										MSB
BIT 1	BIT	2	BIT	3	BIT	4	BIT 5	BIT 6	BIT 7	BIT 8
1	0		1		0		1	1	0	NOT
										USED
2	4		6		8		10	12

DOT COLUMN #12 OF PREVIOUS CHARACTER COLUMN

~~~~~~~~~~~~~~

~~~~~~~~~~~~~~

1 3 5 7 9 11

DOT COLUMN #1 OF NEXT CHARACTER COLUMN

NOTE: IN ACTUAL PRINTING, THESE TWO ROWS MERGE TO PRINT ON THE

SAME ROW.

1	1	1	0	1	1	1	NOT
							USED
BIT 1	BIT 2	BIT 3	BIT 4	BIT 5	BIT 6	BIT 7 BIT 8
LSB							MSB

ODD DOT PLOT DATA BYTE

Figure 4–7. P–Series Plot Data Byte Format

Graphics 4–7