RCA Spectra 70 - Page 58

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The

Flow

Chart

(below)

indicates

both

hardware

and

programming

logic

for

basic

I/O.

,-

- - - - - - - - - - - - - - - - - -

I

I

Yes

STATICIZE

I/O

INSTRUCTION

No

BRANCH

ON

CONDITION

CODE

1

or

2

CC

= 0

INSTR

UCTION

ACCEPTED

FOR

EXECUTION

52

I

I+---

Hardware

I

I

CC = 1

or

2

BRANCH

ON

2

CONDo

CODE

11

DEVICE

IS

INTERRUPT

INOPERABLE

PENDING

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