Zilog Z08470 - Manual (Page 283)

UM008007-0715 Z80 Instruction Description
Z80 CPU
User Manual
271
Example
The Zero Flag is reset and it is required to jump back four locations from 480. The assem-
bly language statement is
JR NZ , $ – 4
The resulting object code and final Program Counter value is:
Location Instruction
47C ← PC after jump
47D –
47E –
47F –
480 20
481 FA (two’s
complement – 6)