Zilog Z80380 Manuale Utente Pagina 85

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Z380
USER'S MANUAL
ZILOG
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
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