Mnemonic

Symbolic Operation

S

Z

F5

H

F3

P/V

N

C

Opcode 76-543-210

Hex

Bytes

M's

T's

Comments

ADD A, r

A := A + r

~

~

~

~

~

V

0

~

10-000-r

1

1

4

ADD A, p*

A := A + p

~

~

~

~

~

V

0

~

11-011-101 10-000-p-

DD

2

2

8

ADD A, q*

A := A + q

~

~

~

~

~

V

0

~

11-111-101 10-000-q

FD

2

2

8

ADD A, n

A := A + n

~

~

~

~

~

V

0

~

11-000-110 <-----n------>

2

2

8

ADD A, (HL)

A := A + (HL)

~

~

~

~

~

V

0

~

10-000-110

1

2

7

ADD A, (IX + d)

A := A + (IX + d)

~

~

~

~

~

V

0

~

11-011-101 10-000-110 <-----d------>

DD

3

5

19

ADD A, (IY + d)

A := A + (IY + d)

~

~

~

~

~

V

0

~

11-111-101 10-000-110 <-----d------>

FD

3

5

19

ADC A, s

A := A + s + CY

~

~

~

~

~

V

0

~

-001-

SUB A, s

A := A - s

~

~

~

~

~

V

1

~

-010-

SBC A, s

A := A - s - CY

~

~

~

~

~

V

1

~

-011-

AND s

A := A AND s

~

~

~

1

~

P

0

0

-100-

OR s

A := A OR s

~

~

~

0

~

P

0

0

-110-

XOR s

A := A XOR s

~

~

~

0

~

P

0

0

-101-

CP s

A - s

~

~

~1

~

~1

V

1

b

-111-

INC r

r := r + 1

~

~

~

~

~

V

0

.

00-r-100

1

1

4

INC p*

p. := p + 1

~

~

~

~

~

V

0

.

11-011-101 00-p-100

DD

2

2

8

INC q*

q. := q + 1

~

~

~

~

~

V

0

.

11-111-101 00-q-100

FD

2

2

8

INC (HL)

(HL) := (HL) + 1

~

~

~

~

~

V

0

.

00-110-100

1

3

11

INC (IX + d)

(IX + d) := (IX + d) + 1

~

~

~

~

~

V

0

.

11-011-101 00-110-100 <-----d------>

DD

3

6

23

INC (IY + d)

(IY + d) := (IY + d) + 1

~

~

~

~

~

V

0

.

11-111-101 00-110-100 <-----d------>

FD

3

6

23

DEC m

m := m - 1

~

~

~

~

~

V

1

.

-101-

CPL

A := A

.

.

~1

1

~1

.

1

.

00-101-111

2F

1

1

4

One's complement.

NEG4

A := 0 - A __

~

~

~

~

~

V

1

~

11-101-101 01-000-100

ED 44

2

2

8

Two's complement.

DAA

Converts A into packed BCD following add or subtract with BCD operands. __

~

~

~

~

~

P

.

~

00-100-111

27

1

1

4