RCA Spectra 70 - Page 138

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Load

and Test

(LTR)

General

Description

Format

(RR)

Condition Code

Interrupt

Action

Notes

Fixed-Point

Instructions

•

The

operand

in

the

register

specified

by

the

second

address

(R

2

)

is

loaded

into

the

general

register

specified

by

the

first

address

(R

1

).

The

condition code is determined by

the

magnitUde

and

the

sign

of

the

loaded

operand.

o 7 8

11

12 15

• 0 -

result

is zero.

1-

result

is less

than

zero.

2 -

result

is

greater

than

zero.

3-not

used.

• None.

• 1. The same

register

can be specified

for

both Rl

and

R

2

•

If

this

is done,

the

operation is equivalent to a

test

with

no

data

movement.

2.

The

operand

specified by

the

second

address

(R

2

)

is unaltered.

129

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