Introduction

The Sharp MZ-80A is based on the Sharp MZ-80K and has basically the same hardware. The machine has some improvements such as a Centronics port, and a better keyboard than the 80K. The machine was presented by Sharp in Germany in 1981. It ran at 2MHz, but was easily upgradable to 4MHz. The RAM could be expanded to 48K Max

CPU - The Sharp LH0080A (Z80 clone)

The Sharp LH0080A is a microprocessor produced by Sharp, and is fully compatible with the Zilog Z80. The LH0080A has been used in various computers:

Sharp 8-bit MZ-series (MZ-80 through MZ-800)
Sony HB-55 MSX
HotBit HB-8000

In the Sharp MZ series the chip often ran at only 2MHz, but upgrade to 4MHz was regularly done by hobbyists.

CPU - The Zilog Z80

The Z80 quickly became popular in the personal computer market, with many early personal computers, such as the TRS-80 and Sinclair ZX80, using the Z80 as their central processing unit (CPU). It was also widely used in home computers, such as the MSX range, SORD, and the Amstrad CPC, as well as in many arcade games. Additionally, it was also used in other applications such as industrial control systems, and embedded systems. The Z80 was widely used until the mid-1980s, when it was gradually replaced by newer microprocessors such as the Intel 80286 and the Motorola 68000.

The Z80 microprocessor was developed by Zilog, a company founded by Federico Faggin in 1974. The Z80 was released in July 1976, as a successor to the Intel 8080. It was designed to be fully compatible with the 8080, but also included new features such as an improved instruction set, more powerful interrupts, and a more sophisticated memory management system.

Originally the Z80 was intended for use in embedded systems, just as the 8080 CPU. But the combination of compatibility, superior performance to other CPUs of the era, and the affordability led to a widespread use in arcade video game systems, and later in home computers such as the Osborne 1, TRS-80, ColecoVision, ZX Spectrum, MSX, Sega's Master System and many more. The Z-80 ran the original Pac-Man arcade cabinet. The Z-80 was used even in the Game Gear (1990s), and the TI-81 and succeeding graphic calculators.

The Z-80 remained in production until June of 2024, 48 years after its original release. Zilog replaced the processor with its successor the eZ80, an 8-bit microprocessor that features expanded memory addressing up to 16 megabytes, and running up to 50MHz, comparable to a Z80 clocked at 150MHz.