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Signal
Function
Pin
#
ACK*
Input
to
the
computer
from
the
printer;
19
low indicates
data
byte
is
received
BUSY
Input
to
the
computer
from
the
printer;
21
high
indicates
busy
PAPER EMPTY
Input
to
the
computer
from
the
printer;
23
high
indicates
no
paper
—
if
the
printer
doesn't provide
this
:
the signal
is
forced low
BUSY*
Input
to
the
computer
from
the
printer;
25
low indicates
device
is
selected
PRIME*
Output
to
the
printer
to
clear
the
buffer;
26
reset
the
printer logic
FAULT*
Input
to
the
computer
from
the
printer;
28
low
indicates
fault
(paper empty,
light
detect
deselect,
and
so
on)
GROUND
Common
signal
ground
2,4,6,8.10,
12,14,16,18,
20,22,24,27,
31,33
NC
Not
connected
29,30,32,34
These
signals are active-low.
Secondary Hard
Disk
Power
Requirements
AC
Power
Requirements
50/60
Hz
+/-
0.5
Hz
100/115
VAC
Installations
(90
to
127V
at
1.1
A
typical)
200/230
VAC
Installations
(100
to
253V
at
0.6A
typical)
Disk
Characteristics
(Initialized
to
TRSDOS-II)
No.
of
Cylinders
306
No,
of
Heads
6
Track
Access Time
3msec
Data
Transfer
Rate
5.0MB/Sec
Dimensions
(Case)
Height
Width
Depth
Weight
5.5"
(140
mm)
14"
(356
mm)
15" (381
mm)
15.5
lbs.
(7.02 kg)
64
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