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IBM 7090 User Manual

IBM 7090
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input
to
the
sense
indicator
register
is
from
the
SR,
the
control
field
must
be
placed
in
the
right
half
of
the
SR,
and
the
left
half
of
the
SR
must
be
cleared
before
setting
the
indicators.
This
is
accomplished
by
gating
only
the
right
half
of
the
SR
to
the
adders
and
then
gating
adders
(P,
1-35)
to
SR(S,
1-35).
Set
Indicators
of
Left
Half
SIL
-0055
(I)
Figure
5.3-54
This
instruction
OR's
the
control
field
(18-35) of
the
instruction
with
the
left
half
of
the
sense
indicator
register.
Execution
is
the
same
as
SIR
except
that
the
control
field
must
be
switched
to
the
left
half
of
the
SR,
and
the
right
half
of
the
SR
must
be
cleared
before
the
indicators
can
be
set.
This
is
done
by
routing
SR(18-35)
to
AD(P-17).
Reset
Indicators
of
Right
Half
RIR
+0057
(I)
Figure
5.3-54
This
instruction
causes
the
reset
of
the
positions
of
the
right
half
of
the
sense
indica-
tor
register
which
correspond
to
ones
in
the
control
field
(18-35) of
the
instruction.
Indicator
positions
corresponding
to
zeros
are
unchanged.
Execution
of
this
instruction
is
identical
to
SIR,
except
that
the
reset-indicators
input
is
used
instead
of
set
indicators.
Reset
Indicator
s of
Left
Half
RIL
-0057
(I)
Figure
5.3-54
For
this
instruction,
the
control
field
of
the
instruction
is
used
as
a
reset
mask
for
the
left
half
of
the
indicator
register.
A
one
in
the
control
field
resets
the
correspond-
ing
indicator
position.
Execution
of
this
instruction
is
similar
to
that
of SIL
except
that
the
reset-indicators
pulse
is
used.
Invert
Indicators
of
Right
Half
I1R +0051
(I)
Figure
5.3-54
This
instruction
inverts
positions
of
the
right
half
of
the
indicator
register
which
correspond
to
ones
in
the
control
field
of
the
instruction.
Indicator
positions
corre-
sponding
to
zeros
in
the
control
field
are
unchanged.
Execution
is
identical
to
that
of
SIR
except
that
the
invert-indicators
pulse
to
the
indicator
input
is
used.
Invert
Indicators
of
Left
Half
IlL
-0051
(I)
Figure
5.3-54
This
instruction
inverts
positions
of
the
left
half
of
the
indicator
register
which
correspond
to
ones
in
the
control
field
(18-35)
of
the
instruction.
Indicator
positions
corresponding
to
zeros
in
the
control
field
are
unchanged.
Execution
of
this
instruction
is
identical
to
that
of
SIL,
except
that
an
invert-indicators
pulse
is
used.
Place
Indicator
in
Accumulator
PIA
-0046
(I)
Figure
5.3-55
The
contents
of
sense
indicators
(0-35)
are
placed
in
positions
(P,1-35)
of
the
accumulator.
The
sense
indicators
are
unchanged.
AC
positions
Q
and
S
are
cleared.
Place
Accumulator
in
Indicators
PAl
+0044
(I)
Figure
5.
3-55
The
contents
of
the
accumulator
(P,
1-35)
are
placed
in
the
sense
indicator
register.
The
accumulator
is
unchanged.
114

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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