Relative Line Slewing - Printronix P3000 Series User's Reference Manual

Relative Line Slewing

Another method of moving paper using the PI line results in vertical slews of a specified number of
lines within the form relative to the current print line (rather than slewing to a specific line). For this to
occur, three criteria must be met:
The PI line must be enabled and set high;
Data bit 5 must be 1 (set); and
The EVFU must be the selected Vertical Format Unit.
The Slew Relative configuration and the status of data bits 1–4 determine the number of lines slewed as
described in Table 5–3. (Note that the state of data bit 5 is the difference between line slewing and us-
ing the interface lines as EVFU channel codes.) As long as the EVFU is selected, this type of vertical
paper motion will occur, regardless of whether the EVFU memory is loaded or not.
If the Double High for One Line attribute is active, n + 1 lines are slewed rather than n lines.
ASCII
Hex Dec
10 16
11 17
12 18
13 19
14 20
15 21
16 22
17 23
18 24
19 25
1A 26
1B 27
1C 28
1D 29
1E 30
1F 31
X = Undefined, 0 or 1
5–6
Table 5–3. P–Series EVFU Line Slewing
Code PI 8 7
1 X X
DLE
1 X X
DC1
1 X X
DC2
1 X X
DC3
1 X X
DC4
1 X X
NAK
1 X X
SYN
1 X X
ETB
1 X X
CAN
1 X X
EM
SUB 1 X X
ESC 1 X X
FS 1 X X
1 X
X
GS
1 X 0
RS
US 1 X 0
Data Bits
6 5 4 3 2
X 1
0 0 0
X 1 0 0 0
X 1 0 0 1
X 1 0 0 1
X 1 0 1 0
X 1 0 1 0
X 1 0 1 1
X 1 0 1 1
X 1 1 0 0
X 1 1 0 0
X 1 1 0 1
X 1 1 0 1
X 1 1 1 0
X 1 1 1 0
0 1 1 1 1
0 1 1 1 1
1 = High
Lines Slewed
1
0
1
1
2
0
3
1
4
0
5
1
6
0
7
1
8
0
9
1
10
0
11
1
12
0
13
1
14
0
15
1 16
0 = Low
Vertical Format Units