Control Data Cyber 170 State Hardware Reference Manual page 134

CP Illegal instructions
l llegal Read/Write
014 j k
Read one word from
(Xk
+
RAE) t o X j
This i n s t r u c t i o n i s i l l e g a l i f t h e UEM enable f l a g i n t h e CYBER 170 exchange
package i s c l e a r . This i n s t r u c t i o n reads t h e 60-bit word from
UKM
l o c a t i o n Xk
plus
RAE
i n t o X j . Xk
i s
l e s s than FLE.
The number of b i t s checked f o r an address-out-of-range c o n d i t i o n v a r i e s ,
depending on the addressing mode of UEM.
I n standard addressing mode, 24 b i t s
of Xk a r e checked a g a i n s t 23 b i t s of FLE with b i t 23 of FLE
equal t o 0.
In
expanded addressing mode, 30 b i t s of Xk a r e checked a g a i n s t 29 b i t s of FLE with
b i t 29 of FLE equal t o 0.
If Xk i s g r e a t e r than o r equal t o FLE, an address-
out-of-range condition i s d e t e c t e d ,
015 jk Write one word from Xj t o
(Xk
+
RAE)
This i n s t r u c t i o n
is
i l l e g a l i f t h e UEM enable f l a g i n the CYBER 170 exchange
package
i s
c l e a r . This i n s t r u c t i o n w r i t e s the 60-bit word from X j i n t o the UEM
l o c a t i o n Xk plus RAE. Xk
i s l e s s than FLE.
The number o f b i t s checked f o r
an
address-out-of-range c o n d i t i o n v a r i e s ,
depending on the addressing mode of UEM. I n standard addressing mode, 24 b i t s
of Xk a r e checked a g a i n s t
23
b i t s of FLE with b i t
23
of FLE equal t o 0.
I n
expanded addressing mode, 30 b i t s of Xk a r e checked a g a i n s t 29 b i t s of FLE with
b i t 29 of FLE equal t o 0.
If Xk
i s
g r e a t e r than o r equal t o FLE, an
address-out-of-range condition i s detected.