IBM 4400 Benutzerhandbuch
278
Chapter
9
Serial Matrix VFU
Serial Matrix VFU
In the Serial Matrix, Proprinter XL, and Epson FX protocols, the VFU is
basically a set of preprogrammed vertical tabs. Various lines of the form are
assigned vertical tabs which are then accessed by control code for rapid
vertical paper movement (slewing) to the tab position. Two control codes are
used for the Serial mode VFU: ESC B for single channel tab setting, and VT to
execute a vertical tab. These codes and the parameters surrounding their use
are described in Chapter 4, “Serial Matrix Printer Protocol,” in Chapter 5, “IBM
Proprinter III XL Printer Protocol,” and in Chapter 6, “Epson FX-1050 Printer
Protocol.”
basically a set of preprogrammed vertical tabs. Various lines of the form are
assigned vertical tabs which are then accessed by control code for rapid
vertical paper movement (slewing) to the tab position. Two control codes are
used for the Serial mode VFU: ESC B for single channel tab setting, and VT to
execute a vertical tab. These codes and the parameters surrounding their use
are described in Chapter 4, “Serial Matrix Printer Protocol,” in Chapter 5, “IBM
Proprinter III XL Printer Protocol,” and in Chapter 6, “Epson FX-1050 Printer
Protocol.”
Table 79. P-Series EVFU Line Slewing
ASCII
Data Bits
Lines Slewed
Hex
Dec.
Code
PI
8
7
6
5
4
3
2
1
10
16
DLE
1
X
X
X
1
0
0
0
0
1
11
17
DC1
1
X
X
X
1
0
0
0
1
2
12
18
DC2
1
X
X
X
1
0
0
1
0
3
13
19
DC3
1
X
X
X
1
0
0
1
1
4
14
20
DC4
1
X
X
X
1
0
1
0
0
5
15
21
NAK
1
X
X
X
1
0
1
0
1
6
16
22
SYN
1
X
X
X
1
0
1
1
0
7
17
23
ETB
1
X
X
X
1
0
1
1
1
8
18
24
CAN
1
X
X
X
1
1
0
0
0
9
19
25
EM
1
X
X
X
1
1
0
0
1
10
1A
26
SUB
1
X
X
X
1
1
0
1
0
11
1B
27
ESC
1
X
X
X
1
1
0
1
1
12
1C
28
FS
1
X
X
X
1
1
1
0
0
13
1D
29
GS
1
X
X
X
1
1
1
0
1
14
1E
30
RS
1
X
0
0
1
1
1
1
0
15
1F
31
US
1
X
0
0
1
1
1
1
1
16
(X = Undefined, 0, or 1) (1 = High) (0 = Low)