Rets rl %r – Epson S1C63000 User Manual
Page 126
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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
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
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
↓
–
–
–
C
3 2 1 0
r
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