Zilog Z80000
32-bit microprocessor / From Wikipedia, the free encyclopedia
The Z80000 is Zilog's 32-bit processor, first released in 1986. It is essentially a 32-bit expansion of its 16-bit predecessor, the Zilog Z8000. It includes multiprocessing capability, a six-stage instruction pipeline, and a 256-byte cache. Its memory addressing system can access 4 gigabytes of RAM. It can execute code written for the Z8000, but is not compatible with the Z80.
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Described at the time as a "mainframe on a chip", the processor is in many ways an equivalent to Intel's 80386. Delays in the initial manufacturing pushed back its availability date to after that of the 386, and the Z80000 saw little use in the market.