Control Data Cyber 170 State Hardware Reference Manual page 120

CP Set lnstructions
5 2 i jK Set Ai t o (Xj)
+
K
SAi X j
+
K
This two-parcel i n s t r u c t i o n uses t h e lower-order 18 b i t s as operand K. This
i n s t r u c t i o n r e a d s an operand from X j , forms t h e sum-of t h e operand p l u s
K,
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 t y p e of r e f e r e n c e i s a
f u n c t i o n of t h e i d e s i g n a t o r value.
i =
0 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
t h e
r e s u l t back i n t o CM.
5 3 i jk
S e t A i t o (Xj)
+
(Bk)
This i n s t r u c t i o n r e a d s operands from X j 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 A i .
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, u s i n g t h e r e s u l t a s t h e r e l a t i v e a d d r e s s . The type of r e f e r e n c e i s
a f u n c t i o n of t h e i d e s i g n a t o r v a l u e .
i = 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 t h e
r e s u l t back i n t o CM.