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Qu'est-ce (qui) est Motorola 6800 - définition
![Motorola 6800 DIP chip [[pinout]]](https://commons.wikimedia.org/wiki/Special:FilePath/Motorola 6800 processor pinout.png?width=200 "Motorola 6800 DIP chip [[pinout]]")
![[[MIKBUG]] was part of the extensive M6800 microcomputer support developed by Motorola's Application Engineering Group.](https://commons.wikimedia.org/wiki/Special:FilePath/Motorola M6800 manuals.jpg?width=200 "[[MIKBUG]] was part of the extensive M6800 microcomputer support developed by Motorola's Application Engineering Group.")
![The [[SWTPC 6800]] computer system, introduced in November 1975, was based on the MEK6800 design evaluation kit chip set.](https://commons.wikimedia.org/wiki/Special:FilePath/SWTPC6800 open.jpg?width=200 "The [[SWTPC 6800]] computer system, introduced in November 1975, was based on the MEK6800 design evaluation kit chip set.")
Wikipédia
The 6800 ("sixty-eight hundred") is an 8-bit microprocessor designed and first manufactured by Motorola in 1974. The MC6800 microprocessor was part of the M6800 Microcomputer System (latter dubbed 68xx) that also included serial and parallel interface ICs, RAM, ROM and other support chips. A significant design feature was that the M6800 family of ICs required only a single five-volt power supply at a time when most other microprocessors required three voltages. The M6800 Microcomputer System was announced in March 1974 and was in full production by the end of that year.
The 6800 has a 16-bit address bus that can directly access 64 KB of memory and an 8-bit bi-directional data bus. It has 72 instructions with seven addressing modes for a total of 197 opcodes. The original MC6800 could have a clock frequency of up to 1 MHz. Later versions had a maximum clock frequency of 2 MHz.
In addition to the ICs, Motorola also provided a complete assembly language development system. The customer could use the software on a remote timeshare computer or on an in-house minicomputer system. The Motorola EXORciser was a desktop computer built with the M6800 ICs that could be used for prototyping and debugging new designs. An expansive documentation package included datasheets on all ICs, two assembly language programming manuals, and a 700-page application manual that showed how to design a point-of-sale terminal (a computerized cash register) around the 6800.
The 6800 was popular in computer peripherals, test equipment applications and point-of-sale terminals. It also found use in arcade games and pinball machines. The MC6802, introduced in 1977, included 128 bytes of RAM and an internal clock oscillator on chip. The MC6801 and MC6805 included RAM, ROM and I/O on a single chip and were popular in automotive applications. The Motorola 6809 was an updated compatible design.
