Zilog Z80380 Manual do Utilizador descarregar pdf (Página 213)

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Z380

™

USER'S MANUAL

ZILOG

DC-8297-03

XOR

EXCLUSIVE OR (BYTE)

XOR [A,]src src = R, RX, IM, IR, X

Operation: A ← A XOR src

A logical EXCLUSIVE OR operation is performed between the corresponding bits of the

source operand and the accumulator and the result is stored in the accumulator. A 1 bit is

stored wherever the corresponding bits in the two operands are different; otherwise a 0 bit

is stored. The contents of the source are unaffected.

Flags: S: Set if the most significant bit of the result is set; cleared otherwise

Z: Set if all bits of the result are zero; cleared otherwise

H: Cleared

P: Set if the parity is even; cleared otherwise

N: Cleared

C: Cleared

Addressing Execute

Mode Syntax Instruction Format Time Note

R: XOR [A,]R 10101-r- 2

RX: XOR [A,]RX 11y11101 1010110w 2

IM: XOR [A,]n 11101110 ——n— 2

IR: XOR [A,](HL) 10101110 2+r

X: XOR [A,](XY+d) 11y11101 10101110 ——d— 4+r I

Field Encodings: r: per convention

y: 0 for IX, 1 for IY

w: 0 for high byte, 1 for low byte

1 2 ... 208 209 210 211 212 213 214 215 216 217 218 ... 267 268

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Zilog Z80380 Manual do Utilizador Página 213