Zilog Z380

The Z380 is a Zilog 16/32-bit processor from 1994. It's Z80 compatible, but it was released much later than its competitors (the Intel 386 and Motorola 68000) and as a result was never able to gain any significant market leverage. On the other hand, the newer and faster eZ80 family has been more successful recently.

The chip supports 16-bit processing with a clock speed of up to 20MHz.

As it stems from the Z180 design, it's a simpler, less efficient design and incompatible with Zilog's previous generation, the Z280, with a lot less features:

• No pipeline
• No memory protection
• Lacks the I/O trap feature
• No built-in cache
• Much simpler MMU
• Minimal of 4 clocks/instruction, against 1 (cache hit) or 2 (cache miss) on the Z280.

References

• "Z380 Microprocessor Product Specification" (pdf). San Jose, California: Zilog. July 2008. Retrieved 2009-07-15. 
• "Z380 CPU Users Manual" (pdf). San Jose, California: Zilog. 2009-02-05. Retrieved 2009-07-15. 

Further reading

• Harston, J.G. (1997-09-09). "Z380 Opcode Map". Retrieved 2009-07-15. 
• Harston, J.G. (1997-09-09). "Full Z380 Opcode List". Retrieved 2009-07-15.