CHAPTER 4: INSTRUCTION SET

RR %r

Rotate right r reg. with carry

1 cycle

Function: 3 2 1 0 C r

Rotates the content of the r register (A or B) including the carry (C) to the right for 1 bit. The content of the C flag moves to bit 3 of the r register and bit 0 moves to the C flag.

Code:

Mnemonic

 

 

MSB

 

 

 

 

 

 

 

 

 

 

LSB

 

 

RR %A

 

 

 

1

 

0

0

0

0

1

1

1

1

0

0

1

 

1

10F3H

 

RR %B

 

 

 

1

 

0

0

0

0

1

1

1

1

0

1

1

 

1

10F7H

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Flags:

E

 

I

 

C

 

Z

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Mode:

Register direct

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Extended addressing: Invalid

 

 

 

 

 

 

 

 

 

 

 

 

RR [%ir]

Rotate right location [ir reg.] with carry

2 cycles

Function: 3 2 1 0 C [ir]

Rotates the content of the data memory addressed by the ir register (X or Y) including the carry

(C)to the right for 1 bit. The content of the C flag moves to bit 3 of the data memory and bit 0 moves to the C flag.

Code:

Mnemonic

 

MSB

 

 

 

 

 

 

 

 

 

 

LSB

 

 

 

RR [%X]

 

 

1

 

0

0

0

0

1

1

1

0

1

1

0

 

0

10ECH

 

 

RR [%Y]

 

 

1

 

0

0

0

0

1

1

1

0

1

1

1

 

0

10EEH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Flags:

E

I

 

C

 

 

Z

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Mode:

Register indirect

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Extended addressing: Valid

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Extended

LDB

%EXT,imm8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

operation: RR

[%X]

 

 

Rotates the content of [00imm8] (00imm8 = 0000H + 00H to FFH)

 

LDB

%EXT,imm8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RR

[%Y]

 

 

Rotates the content of [FFimm8] (FFimm8 = FF00H + 00H to FFH)

122

EPSON

S1C63000 CORE CPU MANUAL