Printronix P9000 Series Plot Data Byte Format, Even DOT Plot Data Byte, ODD DOT Plot Data Byte

Plot Data Byte Format

In P-Series Plot Mode, the format is as follows:

DEach data byte specifies six out of twelve dot columns.

DUsing odd dot plot mode, bits 1 to 6 of the data byte address the odd-numbered dot columns; using even dot plot mode, bits 1 to 6 of the data byte address the even- numbered dot columns.

DBit 6 and/or bit 7 of the data byte must be a •1" (or true) bit in the Plot mode.

DBit 8 of the data byte is not used in the Plot mode and may be either a 1 or 0.

DThe binary equivalent of the plot data bytes must be known to accurately address specific dot positions.

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 this example is reversed.

EVEN DOT PLOT DATA BYTE

NOTE: BIT 6

AND/OR BIT 7

MUST BE •1"

FOR PLOT MODE

DOT COLUMN #12 OF PREVIOUS CHARACTER COLUMN

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 #1 OF
￿ ￿ ￿ ￿ ￿ ￿ ￿ ￿ ￿ ￿ ￿ ￿ ￿ ￿	NEXT CHARACTER
	COLUMN

￿ ￿ ￿ ￿ ￿ ￿ ￿ ￿ ￿ ￿ ￿ ￿ ￿ ￿

NOTE: IN ACTUAL

PRINTING, THESE

TWO ROWS MERGE

TO PRINT ON THE

SAME ROW.

1 3 5 7 9 11

1	1	1	0	1	1	1	USED
							NOT
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