If the data code expressed by
to WIF8 is
or
when
the Paper Instruction signal is 1,
the printer treats the data code as the
start code for FCB data loading and loads into the FCB the data following
the start code, until the printer receives the stop code
The stop
code is
sent with the Paper Instruction signal.
The transferred data is first loaded into the print data buffer
in
the IBF.
Then the interface control
microprogram loads the data
into the FCB and knows the number of lines per page by counting the loaded
FCB
data
bytes.
Table 4.3 shows the definition of the start code.
Table 4.3 Definition of the start code
Code
Operation
8 7 6 5 4 3 2 1
0 1 1 0 1 1 0 0 6 C
Line spacing is 6
Six
eight
specification from
0 1 1 0 1 1 0 1
Line
is 8 lpi.
panel
ignored.
0 1 1 0 1 1 1 0
are fed in
lpi when specified
the operator panel.
Note:
WIF8 is ignored and treated as 0 in 7-bit mode.
In Figure 4.8,
(2
is the format control FCB
data.
Each L or H is one byte of data.
Each pair
an L and H is format
control data for one line on the form.
is data for line 1,
is
data for line 2, and
forth.
is data for the last line, and
indicates the total
number
of lines on a form (page.).
The first byte
of the 2-byte line format data specifies a channel
from 1 to 6 and
the second byte
specifies a channel number from 7 to 12.
Figure 4.9
shows the correspondence between channels and
to WIF8.
Data L
Data H
signals
Specified
channel
8
6
4 3
2 1
6
5
4
1
Note:
X do not care.
(In 8-bit mode)
Figure 4.9 Correspondence between FCB data channels and bits
4 13
Summary of Contents for M304X series
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