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Sharp Corporation is a Japanese electronics manufacturer, founded in 1912. It takes its name from one of its founder's first inventions, the Ever-Sharp mechanical pencil, which was invented by Tokuji Hayakawa in 1915. Since then it has developed into one of the leading electronics companies in the world. As a semiconductor maker, Sharp is among the Worldwide Top 20 Semiconductor Sales Leaders and among the Top 100 R&D Spenders in a list published by IEEE Spectrum magazine.
Overview of the Sharp MZ product line.
Although commonly believed to stand for "Microcomputer Z80", the term MZ actually has its roots in the MZ-40K, a home computer kit produced by Sharp in 1980. This was soon followed by the MZ-80K, K2, C, and K2E, all of which were based on Fujitsu's 4-bit MB8843 processor and provided a simple hexadecimal keypad for input. (The MZ-80C, which was sold fully assembled, included a full alphanumeric keyboard.)
From the first Z80 processor-based model to the MZ-2200 in 1983, the MZ computers included the PC, monitor, keyboard, and tape-based recorder in a single unit, similar to Commodore's PET series. It was also notable for not including a programming language or operating system in ROM, like the IBM PC. This allowed a host of third-party companies, starting with Hudson Soft, to produce many languages and OSes for the system. In an era when floppy disk drives were too expensive for most home users, the MZ's built-in tape drive was considered faster and more reliable than the drive on competing computers; however, this meant that the MZ series was relatively slow to adopt floppy drives as a standard accessory.
Product Line
The MZ series is divided into several lines, including the text-based MZ-80K series, the graphics-based MZ-80B series, and the MZ-3500/5500 series, based on a completely different architecture.
In 1982, Sharp's television division released the X1, a completely new computer. The X series proved to outsell Sharp's own MZ series, and in response, Sharp released the MZ-1500/2500 machines, which featured powered-up graphics and sound capabilities. However, this series saw little marketplace success, and eventually the company abandoned the line in favor of the X68000 series.
The MZ name lives on as the initials of two of Sharp's most well-known products: the Mebius line of PCs, and the Zaurus line of personal digital assistants.
MZ-80K group
Sharp MZ80K
Sharp MZ80K
The Sharp MZ80K was one of the popular early consumer-level microcomputers, with an architecture based on the Zilog Z-80 8-bit microprocessor. It was introduced into Europe in 1979. The machine had 48KB of RAM, 32KB of which was available for user programs (the actual figure was dependent on the memory configuration and the system languages being used). It could run a variety of high-level languages including BASIC and PASCAL & FORTRAN, which had to be loaded into RAM before any programming could be undertaken, or it could be programmed directly in assembly code or machine code. There was an inbuilt monochrome display, and a cassette tape drive for offline data storage. The display, keyboard and cassette drive lifted on hinges to expose the motherboard and circuitry underneath. Graphics capability was primitive, with only preset shapes and icons being available and no native hi-res capability. This was not unusual for a late-1970s vintage microcomputer. The main drawback, however, of the MZ-80K was the non-standard keyboard, which was difficult to use.
The MZ-80K sold well in Europe despite its high price (it retailed at over £500 in 1980), and a large range of software was available, including some quirky Japanese arcade games. It was superseded in 1982 by the MZ-80A and MZ-80B machines.
* MZ-80K series
o MZ-80K (1978) - An all-in-one kit with keyboard.
o MZ-80C - Featured an improved keyboard and 48KB of memory.
o MZ-80K2 - The assembled version of the 80K.
o MZ-80K2E - A low-price version of the 80K2.
o MZ-80A/MZ-1200 - A slightly upgraded version of the 80K.
* MZ-700 series (MZ-80K machines with color graphics）
o MZ-700 (1982) - The first MZ without a built-in monitor; an optional data recorder and plotter could also be installed to the machine. More-or-less fully compatible with the MZ-80K.
o MZ-800 (1985) - The first MZ with a 640x200-pixel graphics mode. Not available in Japan.
o MZ-1500 (1984) - Features 320x200-pixel graphics and built-in sound capability. The tape recorder has been replaced with a floppy drive that reads 2.8-inch Quick Disks.
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