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Add [%ir]+,imm4, Add %ir,%ba – Epson S1C63000 User Manual

Page 78

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EPSON

S1C63000 CORE CPU MANUAL

CHAPTER 4: INSTRUCTION SET

ADD [%ir]+,imm4

Add immediate data imm4 to location [ir reg.] and increment ir reg. 2 cycles

Function:

[ir]

[ir] + imm4, ir

ir + 1

Adds the 4-bit immediate data imm4 to the data memory addressed by the ir register (X or Y).
Then increments the ir register (X or Y). The flags change due to the operation result of the data
memory and the increment result of the ir register does not affect the flags.

Code:

Mnemonic

MSB

LSB

ADD [%X]+,imm4

1

1

0

0

1

0

0

0

1 i3 i2 i1 i0

1910H–191FH

ADD [%Y]+,imm4

1

1

0

0

1

0

0

1

1 i3 i2 i1 i0

1930H–193FH

Flags:

E

I

C

Z

Mode:

Src: Immediate data
Dst: Register indirect
Extended addressing: Invalid

ADD %ir,%BA

Add BA reg. to ir reg.

1 cycle

Function:

ir

ir + BA

Adds the content of the BA register to the ir register (X or Y). This instruction does not affect
the C flag regardless of the operation result.

Code:

Mnemonic

MSB

LSB

ADD %X,%BA

1

1

1

1

1

1

1

0

1

0

0

0

X

1FD0H, (1FD1H)

ADD %Y,%BA

1

1

1

1

1

1

1

0

1

0

0

1

X

1FD2H, (1FD3H)

Flags:

E

I

C

Z

Mode:

Src: Register direct
Dst: Register direct
Extended addressing: Invalid