Zilog Z80380 - Manual (Page 88)

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Z380 ™
U SER ' S M ANUAL
DC-8297-03
Z ILOG
EX
EXCHANGE REGISTER WITH ALTERNATE REGISTER (WORD)
EX dst,src src = R, RX
Operation: if (LW) then begin
dst(31-0)
↔
src(31-0)
end
else begin
dst(15-0)
↔
src(15-0)
end
The contents of the destination are exchanged with the contents of the source, where the
destination is a word register in the primary bank and the source is the corresponding word
register in the alternate bank.
Flags: S: Unaffected
Z: Unaffected
H: Unaffected
V: Unaffected
N: Unaffected
C: Unaffected
Addressing Execute
Mode Syntax Instruction Format Time Note
R: EX R,R’ 11101101 11001011 001100rr 3 L
RX: EX RX,RX’ 11101101 11001011 0011010y 3 L
Field Encodings: rr: 00 for BC, 01 for DE, 11 for HL
y:
0 for IX, 1 for IY