Control Data Cyber 170 State Hardware Reference Manual page 196

Instruction Lookahead Purge Control
Table 5-7. Error E x i t s i n CYBER 170 Monitor Mode (MF=l)
Error Response
Error Condition Exit Mode Selected Exit Mode Not S e l e c t e d
- ---
I l l e g a l i n s t r u c t i o n or 00 1. The i n s t r u c t i o n i s not executed.
1. N / A
( e x i t mode
i s
always
i n s t r u c t i o n . s e l e c t e d ) .
2. S t o r e P and e x i t c o n d i t i o n b i t s (00)
a t l o c a t i o n RAC.
P
e q u a l s a d d r e s s
of i l l e g a l i n s t r u c t i o n .
3. I n t e r r u p t t o e x e c u t i v e S t a t e .
4. CP s t o p s i n executive s t a t e .
Exit c o n d i t i o n b i t 48 s e t by 1 . . The X r e g i s t e r is unchanged.
1.
I n h i b i t r e a d ,
X
unchanged
an incremental read
w i t h
an
a d d r e s s out of range (AOR).
2.
The A r e g i s t e r c o n t a i n s t h e AOR
2.
Continue execution.
a d d r e s s .
3 . S t o r e P and e x i t c o n d i t i o n b i t s (01)
a t l o c a t i o n RAC.
P
e q u a l s a d d r e s s
of increment i n s t r u c t i o n o r a d d r e s s
of i n s t r u c t i o n following t h e increment.
4 . I n t e r r u p t t o e x e c u t i v e s t a t e .
5.
CP s t o p s i n e x e c u t i v e s t a t e .
Exit c o n d i t i o n h i t 48 s e t by 1.
Block m i t e o p e r a t i o n ; c o n t e n t of CM 1. I n h i b i t w r i t e , CM unchanged.
m incrementcll m i t e with an i s unchanged.
2 d d r e s s out of range (AOR). 2. Continue execution.
2. The A r e g i s t e r c o n t a i n s t h e
AOR
a d d r e s s .
3. S t o r e P and e x i t c o n d i t i o n b i t s (01)
a t l o c a t i o n RAG. P e q u a l s a d d r e s s
of i n s t r u c t i o n o r a d d r e s s of
i n s t r u c t i o n following t h e increment.
4. I n t e r r u p t t o e x e c u t i v e s t a t e .
5.
C P s t o p s i n executive s t a t e .
E x i t corirlition b i t
48
s z t by 1. I n h i b i t execution.
1. N / A ( e x i t mode
i s
always
~n
R V I o r branch a d d r e s s s e l e c t e d r e g a r d l e s s of s t a t u s
o u t ~f
rsnge. 2. S t o r e P and e x i t condZtion b i t s
of E M r e g i s t e r b i t 4 8 ) .
(01) a t l o c a t i o n RAC. P e q u a l s
a d d r e s s of i n s t r u c t i o n r e q u i r e d
by R N I o r address
o f
branch
d e s t i n a t i o n i n s t r u c t i o n .
3. I n t e r r u p t t o e x e c u t i v e s t a t e .
4 . C P s t o p s i n executive s t a t e .
(Continued)