Printronix MVP Series user manual Using Evfu, Evfu Channel Assignment

Using EVFU

Once the EVFU program has been enabled and loaded, the program can be accessed by sending the appropriate channel instruction to the printer. The paper is slewed to the physical line on the form having the specified channel number assigned in the EVFU memory. This is accomplished only with the PI line held high. For a data byte to be recognized as an EVFU channel instruction, the following criteria must be met:

•PI line must be high.

•Data bit 5 must be 0 (clear).

Given these two conditions, the lower 4 bits of a byte will specify the EVFU channel number. Table 6–1 lists EVFU channels and their equivalent data bytes.

NOTE: If the Skip–Over–Perforation feature is enabled, the printer will skip from the BOF position to the next TOF.

Table 6–1. EVFU Channel Assignment

First Data Byte		Second Data Byte
Bit #	Channel #	Bit #	Channel #
8	X (don’t care)	8	X (don’t care)
7	X (don’t care)	7	X (don’t care)
6	6	6	12
5	5	5	11
4	4	4	10
3	3	3	9
2	2	2	8
1 (LSB)	1	1 (LSB)	7

6–8 EVFU