RCA Spectra 70 - Page 149

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Compare Word

(CR)

(C)

General Description

Format

(RR)

(RX)

Condition Code

Interrupt

Action

Fixed-Point

Instructions

•

The

operand specified

by

the

first

address

(R

t

)

is compared

with

the

operand specified

by

the

second address

(R

2

or

XdB

2

/D

2

).

Both operands

remain

unaltered. The

result

of

the

comparison determines

the

condition

code setting.

I (CR)

19

Rl

R2

0

7

8

11

12

15

I

(C)

59

Rl

X

2

B2

D2

0

7 8

11

12

15

16

19

20

• 0 - operands

are

equal.

1-

the

operand

specified

by

the

first address is low.

2 -

the

operand specified

by

the

first address is high.

3

-not

used.

• Address

error:

Addressing

(RX

format).

Specification

(RX

format).

31

Note • Both operands

are

considered

as

32-bit signed

integers

and

the

com-

parison

is

algebraic.

140

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