Zilog Z80380 Manual do Utilizador descarregar pdf (Página 146)

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Z380

™

USER'S MANUAL

DC-8297-03

ZILOG

ORW

OR (WORD)

ORW [HL,]src src = R, RX, IM, X

Operation: HL(15-0) ← HL(15-0) OR src(15-0)

A logical OR operation is performed between the corresponding bits of the source operand

and the HL register and the result is stored in the HL register. A 1 bit is stored wherever either

of the corresponding bits in the two operands is 1; 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: ORW [HL,]R 11101101 101101rr 2

RX: ORW [HL,]RX 11y11101 10110111 2

IM: ORW [HL,]nn 11101101 10110110 -n(low) -n(high)- 2+r

X: ORW [HL,](XY+d) 11y11101 11110110 ——d— 4+r I

Field Encodings: rr: 00 for BC, 01 for DE, 11 for HL

y: 0 for IX, 1 for IY

1 2 ... 141 142 143 144 145 146 147 148 149 150 151 ... 267 268

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Zilog Z80380 Manual do Utilizador Página 146