RCA 70/46 - Page 43

8.
Yes
Initiate State Specified in
Program Control Instruction.
9.r-----------~--------~
Extract CC & Program
Mas k from P Counter of
Initiated State
10.,-----------~------------~
Extract Key, Decimal Code
and Privi lege Mode from the
ISR of Initiated State.
11.~--------~-----------.
Set Program Test
Flag Bit (2
31
)
in
Interrupt Flag Register.
12.r---------~----------_.
Staticize and Execute
Instruction Specified in P
Counter of Initiated State.
(An interrupt OCcurS after the
execution of this instruction)
1.
2.
Store Address in Program
Control Instruction in
P
Counter of
Term i nated State.
Store ILC, CC and Program
Mask, in P Counter
of Terminated State
Program Test Bit in
Program Control
Instruction Set?
3.
4.
5.
6.
7.
Program Interrupt
No
Compare IFR to IMR of
State to be initi ated by
Program Control
Instruction
-
No Interrupts
Outstanding
Initiate State Specified in
Program Control Instruction
Extract CC and Program
Mas k from P Counter of
Initiated State.
Extract Key, Dec imal Code
and Privilege Mode from the
ISR of Initiated State.
Stati c i ze and Execute
Instruction Specified in
P
Counter of Initiated State.
An outstanding
Interrupt
Requires
Servicing
See
Figure 3
Block 6
Figure 4. Functional Logic of Program Control Instruction
34