Control Data 3100 Reference Manual page 142

1/0 MODULE
GENERATES REQUEST
I
READ r
*
FROM
REGISTER OX
TERMINATE
CHANNEL
INT = 1
WAIT FOR BLOCK CONTROL.
THEN 5 BUS PRIORITY.
INT=O
INTERRUPT
WRITE r IN
REGISTER OX
READ s
FROM
REGISTER lX
RELEASE BLOCK
CONTROL AND
SCANNER
INPUT OR OUTPUT ONE
~---.;~ CHARACTER OR WORD
TOIFROM REGISTER A
EXIT
RNI AT
P+3
*
rAND
5
HAVE NO MEANING AS
ADDRESSES FOR OPERATIONS
WITH REGISTER A.
Figure 7 -14. 75
1/0
Operation with A