Zilog Z08470 Manual do Utilizador descarregar pdf (Página 272)

100

101

Z80 Instruction Set UM008007-0715

260

Z80 CPU

User Manual

JP cc, nn

Operation

IF cc true, PC ← nn

Op Code

Operands

cc, nn

The first n operand in this assembled object code is the low-order byte of a 2-byte memory

address.

Description

If condition cc is true, the instruction loads operand nn to register pair Program Counter

(PC), and the program continues with the instruction beginning at address nn. If condition

cc is false, the Program Counter is incremented as usual, and the program continues with

the next sequential instruction. Condition cc is programmed as one of eight statuses that

correspond to condition bits in the Flag Register (Register F). These eight statuses are

defined in the following table, which specifies the corresponding cc bit fields in the

assembled object code.

cc Condition

Relevant

Flag

000 Non-Zero (NZ) Z

001 Zero (Z) Z

010 No Carry (NC) C

011 Carry (C) C

100 Parity Odd (PO) P/V

101 Parity Even (PE) P/V

110 Sign Positive (P) S

111 Sign Negative (M) S

11 00 100

1 2 ... 267 268 269 270 271 272 273 274 275 276 277 ... 325 326

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