7630 datasheet(229/238 Pages) RENESAS

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APPENDIX

3.10 Machine instructions

3-58

7630 Group User’s Manual

Addressing mode

Symbol

Function

Details

IMP

IMM

BIT, A, R

BIT, ZP, R

OP n

# OP n

OP n

Jumps to the specified address.

After storing contents of program counter in

stack, and jumps to the specified address.

Load accumulator with contents of memory.

Load memory indicated by index register X

with contents of memory specified by the ad-

dressing mode.

Load memory with immediate value.

Load index register X with contents of

memory.

Load index register Y with contents of

memory.

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.

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.

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

cumulator.

The

result

stored

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.

JMP

JSR

LDA

(Note 2)

LDM

LDX

LDY

LSR

MUL

NOP

ORA

(Note 1)

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)

M(S)

← PCH

← S – 1

M(S)

← PCL

← 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)

When T = 0

← M

When T = 1

M(X)

← M

← nn

← M

M(S) · A

← A ! M(zz + X)

← S – 1

← PC + 1

When T = 0

← A V M

When T = 1

M(X)

← M(X) V M

4A 1

EA 1

→

→C

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