TI-84 Plus series
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The TI-84 Plus series is a line of graphing calculators produced by Texas Instruments. They are ubiquitous in the American education system, and have historically been considered the de facto standard
TI-84 Plus
TI-84 Plus at an angle
TI-84 Plus at another angle
Link port and USB port
Zilog Z80
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The Zilog Z80 is an 8-bit microprocessor designed by Zilog, first released in 1976; it played an important role in the evolution of early personal computing. It was designed to be software-compatible
TI-84 Plus series
…of its predecessor, and it is backwards compatible with older TI-BASIC programs. Despite this, it has significantly improved hardware; its CPU, the Zilog Z80, is 2.5 times as fast as the one in the TI-83 Plus, its display is of a higher contrast, and it has three times as much flash memory. The TI-84 Plus…
A Z80 manufactured in June 1976
A May 1976 advertisement for the Z80 outlines its major advantages over the 8080.
Photo of the original Zilog Z80 microprocessor design in depletion-load nMOS. Total die size is 3545×3350 μm. The blue squares around the outside are the pads that connect to the external pins. This chip was manufactured in 1990.
PIO Z84C2008