Control Data Cyber 170 State Hardware Reference Manual page 234

Maintenance Channel Programming
Table 5-11.
B i t Assignments f o r MCH Function Word t o CP and CM
F i e l d
MCH Function Word t o CP and CM
- -
- -
. . . .
- -
TYPE ( b i t s 0-3) Code 016 = CP and CP r e g i s t e r s .
OPCODE ( b i t s 4-71 Code 016 =
Halt processor.
116
=
S t a r t processor.
416
a
P r e p a r e f o r r e a d .
516
=
P r e p a r e f o r w r i t e .
616
=
Master c l e a r .
716
=
Clear e r r o r s .
TYPE ( b i t s 0-3) Code 116
=
C o n t r o l s t o r e memory.
OPCODE (bits 4-71 Code 416
=
P r e p a r e f o r read.
516 ' P r e p a r e f o r w r i t e .
TYPE ( b i t s 0-3) Code 3-716
= I n t e r n a l memories.
OPCODE ( b i t s 4-71 Code 416
=
P r e p a r e f o r read.
516
=
P r e p a r e t o w r i t e .
TYPE ( b i t s 0-3) Code A16 CM and C M r e g i s t e r s .
OPCODE ( b i t s 4-71 Code 416
=
P r e p a r e f o r read.
5 i 6
=
P r e p a r e f o r write.
616
=
Master c l e a r .
716 Clear e r r o r s .
Table
5-12.
B i t Assignments f o r MCH Function Word t o I O U
F i e l d MCH Function Word
t o
I O U
CONNECT ( b i t s 8-11) Code 016 Connect I O U maintenance r e g i s t e r s .
OPCODE ( b i t s 4-7) Code 416
a
P r e p a r e f o r r e a d ( c o n t r o l word r e q u i r e d ) .
516 = P r e p a r e f o r w r i t e ( c o n t r o l word
r e q u i r e d ) .
616
a
Master c l e a r .
716
'
C l e a r f a u l t s t a t u s r e g i s t e r s .
C16
a
Read I O U s t a t u s summary ( r e a d s 1 b y t e ,
c o n t r o l word n o t r e q u i r e d ) .
TYPE ( b i t s 0-3) Codes 0-716
=
I O U r e g i s t e r s a r e r e a d c i r c u l a r l y ( b y t e 0
f o l l o w s b y t e 7 ) from t h e b y t e s p e c i f i e d
by t h e TYPE f i e l d .