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Table 5.1 Centronics-compatible interface signal lines
Signal
level
Signal name
1
Data Bit 1 to
Data Bit 8
Data Strobe
0
0
Acknowledge
Direction
0
signals
are
control code) input from the lost co
(For ASCII
is used.
'i-bit codes, DBS can be
ignored.)
signal
is
a
input to the printer. The data is read
at the rising edge of this signal.
This signal initializes the printer. Wnen
receives
this
signal,
PDB,
and
control
After clear, TOF is the first line and BOF is the
line.
When
this
printing
or
forms
after the operation.
When this
signal is 1, the printer is not ready
receive
data.
This signal is issued in
.
During
printing
. During forms feed
.
During
offline
state
.
When
the
printer
When the printer responds to a control code
(except
the
DC1
. When the printer responds to each VFU
following to the start: code (X'3.D')
This signal is sent to the mainframe when the
printer
can
receive
inhibit sending signal by the host until the
printer operation such as loading
code. This signal is sent
width pulse.
another or inoperable st:ate,
open or end of farms.
data
(character
code,
the printer.
print band
synchronizing
clock
for
the
printer
clears
functions
and
goes
offline.
signal
is
received
feed,
the
settings
are
one of the following
(including
the
is
inoperable
(fault
code)
data.
This
signal
the
with a 2.5 to 5.5 us
such as top cover
(Fault state)
FCB
data,
reading
it
the
FCB,
during
cleared
TEST
and
state)
data byte
is
used
to
received
5 - 3
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