Jp %y, Jr %a – Epson S1C63000 User Manual

Page 101

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S1C63000 CORE CPU MANUAL

EPSON

95

CHAPTER 4: INSTRUCTION SET

JP %Y

Indirect jump using Y reg.

1 cycle

Function:

PC

←

Y

Loads the content of the Y register into the PC to branch unconditionally.

Code:

Mnemonic

MSB

LSB

JP %Y

1

1

1

1

1

1

1

1

1

0

0

1

X

1FF2H, (1FF3H)

Flags:

E

I

C

Z

↓

–

–

–

Mode:

Register direct
Extended addressing: Invalid

JR %A

Jump to relative location A reg.

1 cycle

Function:

PC

←

PC + A + 1

Adds the content of the A register to the address next to this instruction, to unconditionally
branch to that address. Branch destination range is the next address of this instruction +0 to 15.

Code:

Mnemonic

MSB

LSB

JR %A

1

1

1

1

1

1

1

1

1

0

0

0

1

1FF1H

Flags:

E

I

C

Z

↓

–

–

–

Mode:

Register direct
Extended addressing: Invalid

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