Zilog Z8F0130 - Manual (Page 26)

eZ8
™
CPU Core
User Manual
UM012820-0810 Z8
®
Compatibility
11
Z8
®
Compatibility
The eZ8
™
CPU is an extension and improvement of Zilog’s popular,
easy-to-use, and powerful Z8 CPU architecture. If you have experience
programming the Z8 CPU, then you will have no difficulty adapting to the
eZ8 CPU. The new instructions improve execution for programs
developed in high-level programming languages such as C.
Assembly Language Compatibility
The eZ8 CPU executes all Z8 assembly language instructions except for
the Watchdog Timer Enable During HALT Mode instruction,
WDh , at Op
Code 4Fh ). With the existing Z8 assembly code you can easily compile
the code using the eZ8 CPU. The assembler for the eZ8 CPU is available
for download at
www.zilog.com .
New Instructions
When compared to the Z8 CPU instruction set, the eZ8 CPU features
many new instructions that increase processor efficiency and allow access
to the expanded 4 KB Register File. There are two classes of new
instructions available in the eZ8 CPU, and described in this

document—new function instructions and extended addressing
instructions.