CHAPTER 4: INSTRUCTION SET

OR [%ir]+,%r

Logical OR of r reg. and location [ir reg.] and increment ir reg.

2 cycles

Function: [ir] ←

[ir] ∨ r, ir ←

ir +1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Performs a logical OR operation of the content of the r register (A or B) and the content of the

 

data memory addressed by the ir register (X or Y), and stores the result in that address. 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

 

 

 

 

OR [%X]+,%A

 

1

 

1

0

1

1

0

1

1

0

1

0

0

 

1

1B69H

 

 

 

OR [%X]+,%B

 

1

 

1

0

1

1

0

1

1

0

1

1

0

 

1

1B6DH

 

 

 

OR [%Y]+,%A

 

1

 

1

0

1

1

0

1

1

0

1

0

1

 

1

1B6BH

 

 

 

OR [%Y]+,%B

 

1

 

1

0

1

1

0

1

1

0

1

1

1

 

1

1B6FH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Flags:

E

 

I

 

C

 

Z

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

↓

 

–

 

–

 

↕

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Mode:

Src: Register direct

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Dst: Register indirect

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Extended addressing: Invalid

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OR [%ir],imm4

 

Logical OR of immediate data imm4 and location [ir reg.]

2 cycles

Function: [ir] ←

[ir] ∨

imm4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Performs a logical OR operation of the 4-bit immediate data imm4 and the content of the data

 

memory addressed by the ir register (X or Y), and stores the result in that address.

 

 

Code:

Mnemonic

 

 

MSB

 

 

 

 

 

 

 

 

 

 

 

 

LSB

 

 

 

 

OR [%X],imm4

 

1

 

1

0

1

1

0

0

 

0

 

0

i3

i2

i1

i0

1B00H–1B0FH

 

 

 

OR [%Y],imm4

 

1

 

1

0

1

1

0

0

 

1

 

0

i3

i2

i1

i0

1B20H–1B2FH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Flags:

E

 

I

 

C

 

 

Z

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

↓

 

–

 

–

 

 

↕

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Mode:

Src: Immediate data

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Dst: Register indirect

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Extended addressing: Valid

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Extended

LDB

 

%EXT,imm8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

operation: OR

 

[%X],imm4

 

[00imm8] ←

[00imm8] ∨

imm4 (00imm8 = 0000H + 00H to FFH)

 

LDB

 

%EXT,imm8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OR

 

[%Y],imm4

 

[FFimm8] ←

[FFimm8] ∨

imm4 (FFimm8 = FF00H + 00H to FFH)

S1C63000 CORE CPU MANUAL

EPSON

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