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Ex exchange addressing register with top of stack – Zilog Z80380 User Manual

Page 85

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5-51

Z380

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SER

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M

ANUAL

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ILOG

DC-8297-03

EX

EXCHANGE ADDRESSING REGISTER WITH TOP OF STACK

EX (SP),dst

dst = HL, IX, IY

Operation:

if (LW) then begin

(SP+3)

↔

dst(31-24)

(SP+2)

↔

dst(23-16)

end

(SP+1)

↔

dst(15-8)

(SP)

↔

dst(7-0)

The contents of the destination register are exchanged with the top of the stack. In Long
Word mode this exchange is two words; otherwise it is one word.

Flags:

S:

Unaffected

Z:

Unaffected

H:

Unaffected

V:

Unaffected

N:

Unaffected

C:

Unaffected

Addressing

Execute

Mode

Syntax

Instruction Format

Time

Note

R:

EX (SP),HL

11100011

3+r+w

L

EX (SP),XY

11y11101 11100011

3+r+w

L

Field Encodings:

y: 0 for IX, 1 for IY

See also other documents in the category Zilog Sensors: