Epson S1C63000 Manual

A SERVICE OF

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122 EPSON S1C63000 CORE CPU MANUAL

CHAPTER 4: INSTRUCTION SET

RR %r

RR [%ir]

Rotate right r reg. with carry 1 cycle

Function:

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 100001111001110F3H

RR %B 100001111011110F7H

Flags: EICZ

↓ – ↕↕

Mode: Register direct

Extended addressing: Invalid

r

C

3210

[ir]

C

3210

Rotate right location [ir reg.] with carry 2 cycles

Function:

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] 100001110110010ECH

RR [%Y] 100001110111010EEH

Flags: EICZ

↓ – ↕↕

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)