Printronix P9000 Series User Manual

Page 91

5-11

Vertical Format Units

Channel Assignment

The NVFU memory has the capacity for 256-line forms. The first line identification code

(channel code) in the memory load program defines the first line on the form; the second line

identification code defines the second line on the form, etc. Each line must have a line identifiĆ

cation code. Filler channel codes are used for lines that will not be accessed by the print proĆ

gram. The same filler channel code can be repeated as necessary for any number of lines.

Table 5-7 illustrates the channel codes and load sequence.

Setting bit 5 of a channel assignment code will result in all channel assignment codes after this

code being ignored until an end load code is received. The channel assignment code with bit 5

set is accepted as the last line of the form.

The top-of-form position is designated by channel 1. The first line of the form is automaticalĆ

ly designated as a top-of-form. When the load sequence is received, the paper is assumed to

be at the proper top-of-form position. After the memory is loaded, a Form Feed code (FF, 0C

hex) will move the paper tothe next channel 1 (top-of-form).

End Load - 6F Hex

The end load code terminates the memory load program. The end load code is 6F hex with the

PI line high.

Table 5-7. NVFU Channel Codes

Hex

60
61
62
63
64
65
66
67
68
69
6A
6B
6C
6E
6F

7 6

2 1

1
1

0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
X

0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
X

0
0
1
1
0
0
1
1
0
0
1
1
0
1
1
X

0
1
0
1
0
1
0
1
0
1
0
1
0
0
1
X

1 (TOF)
2 (VT)
3
4
5
6
7
8
9

10
11
12
13
Start Load
End Load
LPI Byte

Dec

96
97
98
99

100
101
102
103
104
105
106
107
108
110
111

0
0
0
0
0
0
0
N

X = Undefined, 0 or 1

1 = High

0 = Low

ASCII

Channel

Data Bits

X
X

1
1

X
X

1
1

X
X

1
1

X
X

1
1

X
X

1
1

X
X

1
1

X
X

1
1

X
X

Code

a
b
c
d
e
f
g
h
i
j
k
l
n
o

1
1

0
0
0
0
0
0
0
0

N=0=6 lpi

N=1=8 lpi

1
1

0
0
0
0
0
0
0
0
0
0
0
0
0