FUJITSU M304X User Manual

Page 49

If the data code expressed by

to WIF8 is

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

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,

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,

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

4 3

2 1

Note:

X do not care.

(In 8-bit mode)

Figure 4.9 Correspondence between FCB data channels and bits

4 13