Epson S1C63000 Manual

A SERVICE OF

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120 EPSON S1C63000 CORE CPU MANUAL

CHAPTER 4: INSTRUCTION SET

RETS

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

Function:

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 100001111001010F2H

RL %B 100001111011010F6H

Flags: EICZ

↓ – ↕↕

Mode: Register direct

Extended addressing: Invalid

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 11111111110111FFBH

Flags: EICZ

↓ –––

C 3210 r