The Probert Encyclopaedia of Science & Technology

Z80

The Z80 is an 8 bit microprocessor chip by Zilog widely used during the 1970's and 1980's - and still in widely used in 2004 - in early personal computers, and which formed the successor to the 8080 microprocessor with some Intel designers leaving Intel and designing the Z80. The Z80 retains all the 8080 instructions and added new instructions. In 2000 Zilog released the eZ80, an updated version of the Z80 microprocessor for modern embedded applications, which operates four times faster at the same clock speed as traditional Z80 microprocessors and can access 16mb of address space, as opposed to the 64 kb accessible by the original
Z80. It should be noted that the original Z80 microprocessor is still in production and use more than twenty years after its inception.
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