M38005M2FS View Datasheet(PDF) - MITSUBISHI ELECTRIC

Part Name

Description

Manufacturer

M38005M2FS

8-BIT SINGLE-CHIP MICROCOMPUTER

MITSUBISHI ELECTRIC  

APPENDIX

3.9 Machine instructions

Symbol

JMP

JSR

LDA

(Note 2)

LDM

Addressing mode

Function

Details

IMP

IMM

A

BIT, A

ZP

BIT, ZP

If addressing mode is ABS

PCL ← ADL

PCH ← ADH

If addressing mode is IND

PCL ← M (ADH, ADL)

PCH ← M (ADH, ADL + 1)

If addressing mode is ZP, IND

PCL ← M(00, ADL)

PCH ← M(00, ADL + 1)

Jumps to the specified address.

OP n # OP n # OP n # OP n # OP n # OP n #

M(S) ← PCH

S←S–1

M(S) ← PCL

S←S–1

After executing the above,

if addressing mode is ABS,

PCL ← ADL

PCH ← ADH

if addressing mode is SP,

PCL ← ADL

PCH ← FF

If addressing mode is ZP, IND,

PCL ← M(00, ADL)

PCH ← M(00, ADL + 1)

After storing contents of program counter in

stack, and jumps to the specified address.

When T = 0

A←M

When T = 1

M(X) ← M

Load accumulator with contents of memory.

Load memory indicated by index register X

with contents of memory specified by the ad-

dressing mode.

A9 2 2

A5 3 2

M ← nn

Load memory with immediate value.

3C 4 3

LDX

LDY

LSR

MUL

NOP

X←M

Y←M

70

0→ →C

M(S) · A ← A ! M(zz + X)

S←S–1

PC ← PC + 1

Load index register X with contents of

memory.

A2 2 2

Load index register Y with contents of

memory.

A0 2 2

Shift the contents of accumulator or memory

to the right by one bit.

The low order bit of accumulator or memory is

stored in carry, 7th bit is cleared.

4A 2 1

Multiplies the accumulator with the contents of

memory specified by the zero page X address-

ing mode and stores the high byte of the result

on the stack and the low byte in the accumula-

tor.

No operation.

EA 2 1

A6 3 2

A4 3 2

46 5 2

ORA

(Note 1)

When T = 0

A←AVM

When T = 1

M(X) ← M(X) V M

“Logical OR’s” the contents of memory and ac-

cumulator. The result is stored in the

accumulator.

“Logical OR’s” the contents of memory indi-

cated by index register X and contents of

memory specified by the addressing mode.

The result is stored in the memory specified by

index register X.

09 2 2

05 3 2

3-60

3800 GROUP USER’S MANUAL

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