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If the data code expressed by WIFl to WIF8 is X'6C', X'6D', or X'6E' 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 X'6F'.
code is also sent with the Paper Instruction signal.
The transferred data is first loaded into the print data buffer (PDB) in
the IBF.
Then the interface control (IFC) microprogram loads the data
into the FCB and knows the number of lines per page by counting the loaded
data
FCB
bytes.
Table 4.3 shows the definition of the start code.
Table 4.3 Definition of the start code
8 7 6 5 4 3 2 1
0 1 1 0 1 1 0 0
6 C
0 1 1 0 1 1 0 1
0
1
1
0
1
1
1
0
Note:
WIF8 is ignored and treated as 0 in 7-bit mode.
In Figure 4.8, L1H1L2H2...LnHn (2 _ _
Each L or H is one byte of data.
data.
control data for one line on the form.
data for line 2, and so forth.
indicates the total
of the 2-byte line format data specifies a channel :number from 1 to 6 and
the second byte (H) specifies a channel number from 7 to 12.
shows the correspondence between channels and WIFl to WIF8.
signals
Specified
channel
Note:
X do not care.
Figure 4.9 Correspondence between FCB data channels and bits
Line spacing is 6 Ipi.
Line specing is 8 lpi. I ehe operaror panel
of lines on a form (page.).
number
Data L
5
4
1
6
(In 8-bit mode)
Operation
Each pair Iof an L and H is format
The first byte (L)
Data H
8
6
4
The stop
ignored.
Figure 4.9
2
1
3
4 - 13
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