RCA 70/46 - Page 68

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2

No

Set

Condition

Code

to

3

and

Terminate

Check

Channel

3

In

structi

on

Next

Instruction

Yes

Set

Condition

Code

to

1

and

Terminate

Check

Channel

Instruction

Next

Instruction

4

5

Start

Is

Privileged

Mode

Bit

Set

to

Zero?

Yes

Is

Specified

Selector

Channel

on

System?

Is

Specified

Channel:

1.

Busy

Sel

ector

2.

Selector

with

Interrupt

Pending

3.

Multiplexor

in

Burst

No

No

Set

Condition

Code

to

0

and

Terminate

Check

Channel

Instruction

Next

Instruction

Yes

Figure 8. Functional Logic

of

Check Channel Instruction

59

Input/Output

Opera.tim

Set

Condition

Code

to

2

and

Terminate

Check

Channel

Instruction

Next

Instruction

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