Zilog Z-80: Difference between revisions
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[[File:Zilog Z80 pinout.png|thumb|350px|right|Pinout (click to enlarge)]] | [[File:Zilog Z80 pinout.png|thumb|350px|right|Pinout (click to enlarge)]] | ||
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[[Category:Microprocessors]] | [[Category:Microprocessors]] | ||
[[Category:Introduced in 1975]] |
Revision as of 23:14, 29 November 2020
The Zilog Z80 is an 8-bit microprocessor introduced in 1975.
It implements an upward-compatible extension of the Intel 8080 instruction set, and requires only a +5 V supply. It adds several registers, a vectored interrupt system, and a hardware DRAM refresh counter to the 8080 architecture.
There were several speed grades, initially starting at 2.5 MHz (non-suffix) / 4 MHz (Z80A) / 6 MHz (Z80B), etc., later CMOS versions up to 20 MHz, and derivatives up to about 50 MHz. Several second-source manufacturers produced their versions of this CPU.