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IBM 7090 User Manual

IBM 7090
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+N
+N
+P
A2D1
A3D1
A4D1
02A2C13B
02A2D20C
02A3F13B
The
time
between
the
A2D1
rising
through
ground
potential,
and
the
A3D1
pulse
rising
through
ground
potential,
must
be
182
(-0,
+40)
nanoseconds.
This
is
also
true
of
A3D1
and
A4D1.
The
time
between
A2D1
and
A4D1
must
be
356
(-0,
+40)
nanoseconds.
The
distance
between
the
leading
edges
of
any
two
D1
pulses
at
the
point
of
distribution
to
logic
blocks
should
be
within
50
nanoseconds
of
multiples
of
182
nanoseconds.
3.
After
checking
the
clock
pulses,
sync
on
I
time
(02A2D03D)
with
a
continuous
enter
instruction
of
LDQ (+0560).
Check
the
following
MQ
test
points,
with
the
C
pulse
set
being
wholly
contained
in
the
gate
for
each
set
~f
points.
This
is
accomplished
by
varying
the
delay
line
located
in
03B3.
Remember
that
the
pulses
are
negative
going
pulses.
CP
Set
Gate
Systems
02A2H18C 02A2H18E
02.05.04.1
02A2H18E
02A2H18F
02.05.05.1
02A2H25C 02A2H25D
02.05.04.1
02A2H25E
02A2H25F
02.05.04.1
4.
While
still
synchronized
on
I
time,
change
the
instruction
(still
under
continuous
enter
instruction)
from
LDQ
to
CLA
(+0500).
Check
the
following
points
that
the
C
pulse
set
is
wholly
contained
within
the
gate
for
each
point
given.
Vary
the
same
delay
line
used
for
the
MQ
positions.
02A2J18C
02A2J18E
A2A2J23C
02A2J23E
02A2J18D
02A2J18F
02A2J23D
02A2J23F
02.05.02.1
02.05.02.1
02.05.02.1
02.05.02.1
The
setting
of
the
delay
line
should
meet
conditions
set
in
both
3
and
4,
the
CP
set
contained
within
all
B
gates.
This
will
adjust
the
set
and
hold
pulses
for
the
shift
cells.
7.3.00
OPERATOR'S
PANEL
7.3.01
CONSOLE
INDICATORS
Indicators
ACC
Indicators
ACC
Overflow
Address
Reg
(3-17)
AND
Automatic
B
Time
CAQ
Channel
Selected
(A-H)
Channel
Tape
Check
(A-H)
Central
Word
Trap
(A-H)
Divide
Check
E
Time
Systems
00.20.30.0
00.20.14.0
00.30.60.0
00.20.19.0
00.20.41.
0
00.80.00.0
00.20.19.0
00.60.00.0
00.60.01.
0
00.60.03.0
00.20.41.1
00.80.00.0
176
Driver
Indicator
-
Systems
2.03.00.1
to
2.03.37.1
02.10.36.1
3.06.00.1to
3.06.04.1
2.09.46.1
4.20.13.1
8.00.21.1
2.09.49.1·
6.00.00.1
to
6.00.01.1
60.32.02.2
60.38-.03.1
2.10.53.1
8.00.19.1

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IBM 7090 Specifications

General IconGeneral
CategoryMainframe Computer
Introduced1959
Transistor-basedYes
Word Length36 bits
Add Time4.8 microseconds
MemoryCore memory
Memory (words)32, 768 words