Sonic Alert msm80154s, msm83c154s, msm85c154hvs ORL A, Rr Logical or register to accumulator, 339

Models: msm83c154s msm85c154hvs msm80154s

1 378
Download 378 pages 26.51 Kb
Page 346
Image 346

DESCRIPTION OF INSTRUCTIONS

80. ORL A, Rr (Logical OR register to accumulator)

 

 

7

 

 

 

 

 

 

0

 

Instruction code

:

0

1

0

0

1

r2

r1

r0

Byte 1

Operation

: (A)(A) OR (Rr)

r=0 thru 7

 

 

 

 

Number of bytes

: 1

 

 

 

 

 

 

 

 

Number of cycles

: 1

 

 

 

 

 

 

 

 

Flags

:

C

AC

F0

RS1

RS0

OV

F1

P

(PSW)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Description

 

 

 

 

 

 

 

 

 

 

: The logical OR between the accumulator contents and the

 

 

register r contents is determined. The result is placed in the

 

 

accumulator and the flag is updated.

 

 

Example ORL A, R5

 

 

 

 

 

 

 

 

 

 

 

 

7

 

 

0

 

 

 

 

 

Instruction code

:

0 1

0 0

1 1

0 1

Byte 1

 

 

 

Before execution Accumulator

0 0 0 0 0 0 0 0

70 Register 5

0 1 1 1 0 1 0 1

70

After execution Accumulator

0 1 1 1 0 1 0 1

70 Register 5

0 1 1 1 0 1 0 1

70

339

Page 346
Image 346
Sonic Alert msm80154s, msm83c154s, msm85c154hvs user manual ORL A, Rr Logical or register to accumulator, 339