Printronix MVP Series user manual 04H Even Dot Plot 05H Odd Dot Plot, Mode

04H — Even Dot Plot

05H — Odd Dot Plot

Plotting allows you to address and print any individual dot position, which includes printing bar codes bar graphics, halftones, block characters, schematics and complex curves. Each Plot program line results in a horizontal print row consisting of up to 220 six–bit dot patterns, depending on the graphics mode and plot resolution selected as shown in Table 7–3 .

Table 7–3. Number of Dot Positions in a Horizontal Plot Line

	Odd or Even Dot Plot		High Resolution Plot
Graphics
	Data	Dot	Data	Combined
Mode	Bytes	Positions	Bytes	Dots
				Positions
Correspondence (Mode 001)	200	1320	440	2640
Data Processing (Mode 002)	132	792	264	1584
Medium Resolution (Mode	137.5	825	275	1650
003)
High Resolution (Mode 004)	159	954	318	1908
High Resolution (Mode 005)	176	1056	352	2112

The dot patterns printed correspond to the received ASCII character code true or 1 bits. Each printable character has an eight–bit code, and patterns are obtained using the least significant six–bits of the code. That is, a dot is printed for every bit set (every 1) in the ASCII code except the seventh and the eighth or most significant bit (MSB).

Figure 7–1 illustrates the actual data pattern sent. Whereas Figure 7–2 shows how the printer interprets the data for plotting; the dot pattern progresses from the left to right with the left dot set by the least significant bit (LSB). The six bits are assigned to six adjacent columns (odd or even plot) within a character position. Therefore, bits having a digital value of 1 are printed, and any digital 0 bit is not printed.

7–8 Programming