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Table 4.1 DPC-compatible interface signal lines (Positive logic)
Signal
Signal name
1
kite
Machine
5v 0
Online
Data Request
5v 0
Write Strobe
Write
Information
Buffer Clear
connect 1
Connect 2
Paper
Instruction (PI) /
Direction
0
System-Printer
0
signal is high (logical 1)
conditions are satisfied for the printer:
. Power has come on and all voltage levels are
process
. The hammer drive system is normal.
. An error is nor dececced.
This signal enables information to be transmitted
with
system connected to
high when the following conditions are satisfied:
. Write machine beady (FMR) is 1.
. The
switch is pressed.
. The
print band is rotaxing
A
synchronizing
signal
the system, and is high when daEa
be
accepted.
This
is
a
strobe
signal
the
printer.
The
printer
signal
when
the
leading
is received.
This is the
input data from the
7-bit codes, WIFE
can be ignored by setting.)
The data for one line scored
printer
is
cleared
by
signal
is
used
of the interface connector.
connector is connected, the Connecr
lines are connected.
signal
is
high
by the sysrem.
input data on the WIF lines is stored in the FCB.
This signal is checked 'by the printer at the timing
of the Write Strobe signal in the same way
For derails, see
when the
has
been
completed.
the printer and goes
normally.
for
data transferred
from the system
for
Write
Information to
resets
its
Data
edge
of
this
strobe
system.
(For
in the buffer of the
this
signal.
for
confirming
the
connection
When the interface
1 and Connect 2
when
forms
control
is
this signal is logical 1, the
Section
4.4.2.
following
from
Request
signal
ASCII
performed
as WIFl
4 - 3
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