Zilog Z08470 Manual de usuario Pagina 291

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UM008007-0715 Z80 Instruction Description
Z80 CPU
User Manual
279
Example
The Program Counter contains 1A47h, the Stack Pointer contains 3002h, and memory
locations contain the following data.
If an instruction fetch sequence begins, the 3-byte instruction CD
3521h is fetched to the
CPU for execution. The mnemonic equivalent of this instruction is CALL
2135h. Upon
the execution of this instruction, memory address
3001h contains 1Ah, address 3000h
contains
4Ah, the Stack Pointer contains 3000h, and the Program Counter contains
2135h, thereby pointing to the address of the first op code of the next subroutine to be
executed.
Location Contents
1A47h CDh
IA48h 35h
1A49h 21h
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