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Home > Motorola 6800


The 6800 is a microprocessor produced by Motorola and released shortly after the Intel 8080 in 1975. It had 78 instructions, including the (in)famous, undocumented Halt and Catch Fire (HCF) bus test instruction. It may have been the first µP with an index register.

It was usually packaged in a 40 pin DIP (dual-inline package).

Several first-generation microcomputers of the 1970s, available by mail order as kits or in assembled form, used the 6800 as their CPU; examples are the SWTPC 6800 (the first computer to use the 6800) and the MITS Altair 680 range (MITS offering these as alternatives to its Altair 8800).

The 6800 'fathered' several descendants, the pinnacle being the greatly upgraded 6809, which was used in the Vectrex video game console and the TRS-80 Color Computer, among others. There are also many microcontrollerA microcontroller is a computer-on-a- chip optimised to control devices. It is a type of microprocessor emphasizing self-sufficiency and cost-effectiveness, in contrast to a general-purpose microprocessor, the kind used in a PC. A typical microcontrollers descended from the 6800 architecture, such as the 6805, 6807, 6808, 68HC11dual in-line package (DIP), as well as the 52-pin plastic leaded chip carrier (PLCC) as shown above. The Motorola 68HC11 6811 or HC11 for short) is a microcontroller (µC) family from Motorola, descended from the Motorola 6800 microprocessor, and a subfami and 68HC12. Competitor MOS TechnologyMOS Technology, Inc. also known as Commodore Semiconductor Group was a microprocessor and calculator company famous for its 6502 processor. Commodore 64 showing some important MOS Technology circuits: the 6510 CPU and the 6581 (SID). Company history MOS o cloned and upgraded the 6800 with its 6502The MOS Technology 6502 is an 8-bit microprocessor designed by MOS Technology in 1975. When it was introduced it was the least expensive full featured CPU on the market by far, at about 1/6th the price, or less, of competing designs from larger companies and successors, used in many computers and game consoles during the late 1970s and early-to-mid- 1980sMillennia: 1st millennium 2nd millennium 3rd millennium Centuries: 19th century 20th century 21st century Decades: 1930s 1940s 1950s 1960s 1970s 1980s 1990s 2000s 2010s 2020s 2030s Years: 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 Events and trends (most notably the Atari 2600The Atari 2600 released in 1977, was the first successful video game console to use plug-in cartridges instead of having one or more games built in. It was originally known as the Atari VCS for V ideo C omputer S ystem and the name "Atari 2600" was first, Apple IIpersonal computers of the 1980s. As can be seen, the Apple II came with an integrated keyboard, common with early personal computers, but very uncommon today. The one pictured is shown with two official Apple floppy disk drives and a monitor. The Apple II, and the Commodore PETThe PET P ersonal E lectronic T ransactor was a home-/ personal computer produced by Commodore starting in the late 1970s. Although it was no top seller outside the Canadian, US, and UK educational markets, it was Commodore's first full-featured computer, VIC-20 and C64).



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