Control Data Cyber 170 State Hardware Reference Manual page 122

CP
Set instructions
5 6 i j k Set Ai t o (Bj)
+
(Bk)
SAi B j
+
B k
This i n s t r u c t i o n r e a d s operands from Bj and Bk, forms t h e sum of t h e operands,
and d e l i v e r s t h e r e s u l t t o Ai. I f t h e i d e s i g n a t o r i s nonzero, a r e f e r e n c e i s
made t o CM, using t h e r e s u l t a s t h e r e l a t i v e address. The type of r e f e r e n c e i s
a
function of t h e i d e s i g n a t o r value.
i s O N o CM r e f e r e n c e
i
= 1,2,3,4,5
Read from CM
t o
X i
i = 6,7
Write
i n t o CM from X i
This i n s t r u c t i o n o b t a i n s operands from CM f o r computation and d e l i v e r s the
r e s u l t s back i n t o CM.
5 7 i j k
Set Ai t o (Bj)
-
(Bk) SAI B j
-
Bk
This i n s t r u c t i o n r e a d s operands from
B j
and Bk, s u b t r a c t s t h e Bk operand from
the Bj operand, and
d e l i v e r s t h e r e s u l t t o A i .
I f t h e i d e s i g n a t o r i s nonzero,
a reference i s made t o CM, using t h e r e s u l t as t h e r e l a t i v e a d d r e s s . The type
of reference
i s a
f u n c t i o n of t h e i designator value.
i
=
0
N o CM r e f e r e n c e
1 =
1 , 2 , 3 , 4 , 5
Read from
CM
t o X i
i
=
6,7 Write i n t o CM from X i
This i n s t r u c t i o n o b t a i n s operands from CM f o r computation and d e l i v e r s t h e
r e s u l t back i n t o CM.