Technical information

Line Printer Card-Edge Signals
PIN
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
SIGNAL
NAME
DATA STROBE*
GND
Dl
GND
D2
GND
D3
GND
D4
GND
D5
GND
DB
GND
D7
GND
D8
GND
NC
GND
BUSY
GND
OUT OF PAPER PE
GND
UNIT SELECT SLCT
PRIME*
GND
FAULT*
NC
NC
GND
NC
GND
GND
DESCRIPTION
A 1.0 microsecond pulse used
to clock the data from the
processor
to the printer logic.
Signal Ground
Input data levels. A high represents a binary one, a low
represents a zero. All printable characters (i.e., codes
having a one in
DATA 6 or DATA 7) are stored in the
printer buffer. Control characters (i.e., codes having a
zero in
both DATA 6 and DATA 7) are used to specify
special
control functions. These codes are not stored in
the
buffer except when they specify a print command
and
are preceded by at least one printable character in
that line.
Not Connected
Signal Ground
A level indicating that the printer cannot receive data.
Signal
Ground
A level indicating that the printer is out of paper.
Signal
Ground
A level indicating that the printer is selected.
A level which clears the
printer buffer and initializes
the logic.
Signal
Ground
A level that indicates a printer fault condition such as
paper empty, light detect or a deselect condition.
Not Connected
Not Connected
Signal Ground
Not Connected
Signal
Ground
Signal Ground
28
NOTE: All GND signals are common.
33 31 29 27 25 23 21 19 17 15 13 11 9 7 5 3 1
:: :: :: :: :: :: :: :: :: : : : : : :: :1
34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2