Epson S1C63000 JR %BA, JR [addr6], 1 cycle, 2 cycles, Jump to relative location BA reg, Jump to relative location [addr6]

CHAPTER 4: INSTRUCTION SET

JR %BA

Jump to relative location BA reg.

1 cycle

Function: PC ←

PC + BA + 1

Adds the content of the BA 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

255.

Code:

Mnemonic

MSB

LSB

JR %BA

1

1

1

1

1

1

1

1

1

0

0

0

0

1FF0H

Flags:

E

I

C

Z

↓

–

–

–

Mode:

Register direct

Extended addressing: Invalid

JR [addr6] Jump to relative location [addr6] 2 cycles

Function: PC ← PC + [addr6] + 1 (addr6 = 0000H–003FH)

Adds the content of the data memory (0000H–003FH) specified with the addr6 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 [addr6]

1

1

1

1

1

0

1

a5

a4

a3

a2

a1

a0

1F40H–1F7FH

Flags:

E

I

C

Z

↓

–

–

–

Mode:

6-bit absolute

Extended addressing: Invalid

96 EPSON S1C63000 CORE CPU MANUAL