Zilog Z380
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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.[1]
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
- ^ Eeiss, Ray (April 28, 1994). "Zilog extends Z80 to 16 bits, 32-bit addressing". EDN.
- "Z380 Microprocessor Product Specification" (pdf). San Jose, California: Zilog. 2008. Retrieved 2009-07-15.
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ignored (help) - "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.