Zilog Z08470 Manual de usuario Pagina 276

  • Descarga
  • Añadir a mis manuales
  • Imprimir
  • Pagina
    / 326
  • Tabla de contenidos
  • MARCADORES
  • Valorado. / 5. Basado en revisión del cliente
Vista de pagina 275
Z80 Instruction Set UM008007-0715
264
Z80 CPU
User Manual
JR C, e
Operation
If C = 0, continue
If C = 1, PC PC+ e
Op Code
JR
Operands
C, e
Description
This instruction provides for conditional branching to other segments of a program
depending on the results of a test on the Carry Flag. If the flag = 1, the value of displace-
ment e is added to the Program Counter (PC) and the next instruction is fetched from the
location designated by the new contents of the PC. The jump is measured from the address
of the instruction op code and contains a range of –126 to +129 bytes. The assembler auto-
matically adjusts for the twice incremented PC.
If the flag = 0, the next instruction executed is taken from the location following this
instruction. If condition is met
If condition is not met:
Condition Bits Affected
None.
M Cycles T States 4 MHz E.T.
3 12 (4, 3, 5) 3.00
M Cycles T States 4 MHz E.T.
2 7 (4, 3) 1.75
00 1 00011
38
e–2
Vista de pagina 275
1 2 ... 271 272 273 274 275 276 277 278 279 280 281 ... 325 326

Comentarios a estos manuales

Sin comentarios