RCA 70/46 - Page 78

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5

15

__

------~----

__

Is

Multiplexor

Operating

in

Burst

Mode?

Ho

Store

Subchannel

Registers

Back

in

Hon-

Addressable

Main Memory

Ves

7

Is

Specified

Channel

the

Multiplexor?

}-~V~e~s~

__________________

-.~Ho

Hext

Instruction

Input/Output

Operation

~

________

~

________

~8

Set

Channel

Data

Check

Bit

in

Channel

Status

Byte;

Change

Data

Byte

to

(FF)

16

~~~

________________

~

10

Decrement

the

Main Memory

Data

Address

By

One

Is

the

Chain

Data

(CD)

Flag

in

the

Cammand

Set

13

Ha

Tell

Device

to

Set

an

End

Condition

Go

to

"End

and

Chaining

Servicing"

_

Block

II

Figure

9.

Functional

Logic

of

Servicing a

Data

Transfer

(Cont'd)

69

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