Printronix P3000 Series manual Plotting the Data, Odd Dot Plot Pattern Plan

DOUBLE DENSITY PLOT

For double density plot, the plot line contains: Control Code 04 hex, plot data bytes, a Line Terminator (0A hex or 0C hex), Control Code 05 hex, plot data bytes, and a Line Terminator. The control sequence for sending P–Series Double Density Plot is as follows:

1.Send the even dot plot control code EOT (04 hex), followed by plot data bytes. (Refer to Table 4–1 on page 4–11.)

2.Send a line terminator, which causes the printer to plot the data bytes. The paper is not advanced in Double Density Plot; the printer now waits for the second plot command and plot data bytes.

3.Send the odd dot plot control code ENQ (05 hex) and a second line of data, followed by a line terminator.

a.A line feed (0A hex) used as the line terminator plots the contents of the buffer and advances the paper a single dot row, based on the vertical density of the current mode. A CR (if CR = CR + LF is configured) may also be used with the same result.

b.A form feed (0C hex) used as the line terminator plots the data bytes and advances the paper to the top of the next form.

4.Regardless of which line terminator code is sent, the printer defaults to the previously selected print mode unless further plot control codes are provided with the data.

NOTE: Failure to adhere to this format may cause unexpected results.

Plotting the Data

P–Series Plot Mode plots the image from the horizontal bit pattern. Figure 4–8 duplicates the pattern shown in Figure 4–4 but is modified for Odd Dot Plot. Eight dot rows are required, two characters per row, six columns per character. (The dots required to produce the pattern are shown Figure 4–9 on page 4–10.)

1

2

3

DOT 4

ROW 5

6

7

8

		1st						2nd				1st		2nd
	CHARACTER						CHARACTER				CHARACTER		CHARACTER
	ODD COLUMNS						ODD COLUMNS				ASCII	DECIMAL	ASCII	DECIMAL
1	3	5	7	9	11	1	3	5	7	9	11
											*	42	@	64
												73	A	65
											\	92	@	64
											*	42	@	64
												73	A	65
											\	92	@	64
											*	42	@	64
												73	A	65

Figure 4–8. Odd Dot Plot Pattern Plan

Graphics 4–9