Epson S1C63000 RETS, RL %r, 1 cycle, 2 cycles, Return and skip, Rotate left r reg. with carry

CHAPTER 4: INSTRUCTION SET

RETS

Return and skip

2 cycles

Function: PC ←

([SP1*4+3]~[SP1*4]), SP1 ←

SP1 +1, PC ←

PC + 1

After executing the RET instruction, increments the PC to skip 1 instruction immediately after

the return.

Code:

Mnemonic

MSB

LSB

RETS

1

1

1

1

1

1

1

1

1

1

0

1

1

1FFBH

Flags:

E

I

C

Z

↓

–

–

–

RL %r Rotate left r reg. with carry 1 cycle

Function: C 3 2 1 0 r

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

Code:	Mnemonic		MSB														LSB
	RL %A			1		0	0	0	0	1	1	1	1	0	0	1		0	10F2H
	RL %B			1		0	0	0	0	1	1	1	1	0	1	1		0	10F6H
Flags:	E	I	C		Z
	↓	–	↕			↕
Mode:	Register direct
	Extended addressing: Invalid

120 EPSON S1C63000 CORE CPU MANUAL