IBM 4400 manual Plot Data Line Format, Series Plot Data Byte Format

Chapter 8 P-Series Compatible Plot Mode (Odd/Even Dot Plotting)

EVEN DOT PLOT DATA BYTE

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

NOTE: BIT 6 AND/OR
NOTE: BIT 6	2	4		6	8	10 12
BIT 7 MUST BE “1”
AND/OR BIT 7
FOR PLOT MODE
MUST BE 1"
FOR PLOT MODE
	~~~~~~~~~~~~~~
DOT COLUMN
#12 OF PREVIOUS
COLUMN ￿	~~~~~~~~~~~~~~
CHARACTER
	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 33. P-Series Plot Data Byte Format

See Appendix C, “P-Series Plot Byte Definition,” for a complete definition of the valid plot data bytes.

Plot Data Line Format

A plot data line may contain the following plot data bytes: When using 132 column paper, the maximum bytes are 132 for a horizontal dot density of 60 dpi or 198 bytes for a horizontal dot density of 90 dpi. If Auto Line Feed is disabled, any bytes over the maximum are lost. If the maximum is exceeded and Auto Line Feed is enabled, a Line Feed (LF) is forced and the remaining plot data is printed as text on the next line.

Normal Density Plot

For normal density plot, the plot line contains: Control Code hex 05, plot data bytes, and a Line Terminator (hex 0A or hex 0C). The control sequence for sending the P-Series Normal Density Plot is:

1.Send the plot command code ENQ (hex 05).

2.Send the plot data bytes.

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