DESCRIPTION OF INSTRUCTIONS

56. MOV A, @Rr (Move indirect address to accumulator)

 

 

 

7

 

 

 

 

 

 

0

 

Instruction code

:

 

1

1

1

0

0

1

1

r

Byte 1

Operation

: (A)((Rr))

r=0 or 1

 

 

 

 

 

Number of bytes

: 1

 

 

 

 

 

 

 

 

 

Number of cycles

: 1

 

 

 

 

 

 

 

 

 

Flags

:

 

C

AC

F0

RS1

RS0

OV

F1

P

(PSW)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Description

 

 

 

 

 

 

 

 

 

 

: The data memory location contents addressed by the register r

 

 

contents are copied to the accumulator, and the flag is updated.

Example MOV A, @R0

 

 

 

 

 

 

 

 

 

 

 

 

7

 

 

 

0

 

 

 

 

 

Instruction code

:

1

1

1 0

0 1

1 0

Byte 1

 

 

 

Before execution Register 0

0 1 1 1 0 0 1 0

70

72H

1 0 1 1 0 1 1 1

70 Accumulator

0 1 0 0 1 1 0 0

70

After execution Register 0

0 1 1 1 0 0 1 0

70

72H

1 0 1 1 0 1 1 1

70 Accumulator

1 0 1 1 0 1 1 1

70

315

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Sonic Alert msm80154s, msm83c154s, msm85c154hvs user manual MOV A, @Rr Move indirect address to accumulator, 315