NSC800D datasheet(52/76 Pages) NSC

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1212 InputOutput

A (n)

Input data to the Accumulator from the IO device at ad-

dress N

w (n)

No flags affected

76543210

11011011

Timing

M cycles

T states

11 (4 3 4)

Addressing Mode

Source

Direct

Destination

r (C)

Input data to register r from the IO device addressed by the

contents of register C If re110 only flags are affected

w (C)

S Set if result is negative

Z Set if result is zero

H Reset

PV Set if result parity is even

N Reset

C NA

76543210

11101101

000

Timing

M cycles

T states

12 (4 4 4)

Addressing Mode

Source

Destination

OUT

Output register r to the IO device addressed by the con-

tents of register C

(C)

w r

No flags affected

76543210

11101101

001

Timing

M cycles

T states

12 (4 4 4)

Addressing Mode

Source

Destination

INI

Input data from the IO device addressed by the contents of

of the HL register The HL pointer is incremented and the

byte counter B is decremented

(HL)

w (C)

S Undefined

w B b 1

Z Set if Bb1e0 otherwise reset

w HL a 1

H Undefined

PV Undefined

N Set

C NA

76543210

11101101

10100010

Timing

M cycles

T states

16 (4 5 3 4)

Addressing Mode

ImpliedSource

direct

Destination

OUTI

Output data from memory location (HL) to the IO device at

port address (C) increment the memory pointer and decre-

ment the byte counter B

(C)

w (HL)

S Undefined

w B b 1

Z Set if Bb1e0 otherwise reset

w HL a 1

H Undefined

PV Undefined

N Set

C NA

76543210

11101101

10100011

Timing

M cycles

T states

16 (4 5 3 4)

Addressing Mode

ImpliedSource

direct

Destination

IND

Input data from IO device at port address (C) to memory

location (HL) and decrement HL memory pointer and byte

counter B

(HL)

w (C)

S Undefined

w HL b 1

Z Set if Bb1e0 otherwise reset

w B b 1

H Undefined

PV Undefined

N Set

C NA

76543210

11101101

10101010

Timing

M cycles

T states

16 (4 5 3 4)

Addressing Mode

ImpliedSource

direct

Destination

NSC800D Datasheet(PDF) 52 Page - National Semiconductor (TI)

NSC800D Datasheet(HTML) 52 Page - National Semiconductor (TI)

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