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EVFU PROGRAM EXAMPLE
00011101
GS CODE-START VFU LOAD
1.
01000001
Line 1 :
Top of Form
01000000
2. 01000000
Line 2:
No Tabs Set in this line
01000000
3. 01010000
Line 15:
Tab set in ChannelS
01000000
17. 01011010
Line 17:
Tab set in Channels 2, 4 and 5
01000000
25. 01000010
Line 25:
Tab set in Channel 2
01000000
63. 01000011
Line 63:
Bottom of Form
01000000
67. 01000001
Effective
Line 1 of next page:
Top of Form
01000000
Summarizing the commands utilizing the EVFU:
Form Feed:
ASCII character FF (12 Decimal) advances forms to the next top of form.
Vertical Tab:
ASCII character VT (21 Decimal) advances forms to the next line for which
channel 2 of the EVFU is set.
Unit Separator:
ASCII character US (31 Decimal) informs the printer that the next byte contains
forms motion information. This succeeding byte is formatted in one of two ways,
as follows:
7
6
5
4
3
2
1
0
A
X
X
X
0
0
C2 C1
CO
B
X
X
X
1
N3 N2 NI
NO
In example A, CO-C2 is a weighted binary number indicating the tab channel
to be used (e.g., 101
=
channelS).
In example B, NO-N3 is a weighted binary number indicating the absolute number
of lines that forms are to be advanced, regardless of their present position (e.g.,
1111 advances forms 15 lines).
The 1 in position 4 indicates that this absolute format is to be used.
-45-
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