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Encyclopedia > Motorola 6800
Motorola 6800 Microprocessor
Motorola 6800 Microprocessor

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 ┬ÁP with an index register. Image File history File links Description: Motorola 6800 Microprocessor Source: http://www. ... Image File history File links Description: Motorola 6800 Microprocessor Source: http://www. ... A microprocessor (sometimes abbreviated µP) is a digital electronic component with transistors on a single semiconductor integrated circuit (IC). ... Motorola (NYSE: MOT) is an American international communications company based in Schaumburg, Illinois, a Chicago suburb. ... Intel C8080A processor. ... 1975 (MCMLXXV) was a common year starting on Wednesday. ... This article is based in part on the Jargon File, which is in the public domain. ... An index register in a computer CPU is a processor register used for modifying operand addresses during the run of a program, typically for doing vector/array operations. ...


It was usually packaged in a 40 pin DIP (dual-inline package). ICs in DIP14-Package Several PDIPs and CERDIPS. The large CERDIP in the foreground is an 8080 processor. ...


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 MEK6800D2 development board, the SWTPC 6800 (the first computer to use the 6800), the MITS Altair 680 range (MITS offered these as alternatives to its Altair 8800 which used the Intel 8080), several of the Ohio Scientific designs, Gimix, Smoke Signal Broadcasting, Midwest Scientific, and the Newbear 77/68. The 1970s decade refers to the years from 1970 to 1979, inclusive. ... CPU redirects here. ... The MEK6800D2 was a development board for the Motorola 6800 microprocessor, produced by Motorola in 1976. ... The U.S. company SWTPC started in 1964 as DEMCO (Daniel E. Meyer Company). ... Altair 8800 The MITS Altair 8800 was a microcomputer design from 1975, based on the Intel 8080A CPU. Sold as a kit through Popular Electronics magazine, the designers intended to sell only a few hundred to hobbyists, and were surprised when they sold over ten times that many in the... The Newbear 77/68 was a kit of parts from which a purchaser could construct a first generation home computer based around a Motorola 6800 microprocessor. ...


The 6800 'fathered' several descendants, the pinnacle being the greatly extended and semi-compatible 6809, which was used in the Vectrex video game console and the TRS-80 Color Computer, among several others. There are also many microcontrollers descended from the 6800 architecture, such as the Motorola 6801/6803, 6805, 68HC08, 68HC11 and 68HC12. 1 MHz Motorola 6809E processor, manufactured in 1983. ... The Vectrex is an 8-bit video game console developed by General Consumer Electric (GCE) and later bought by Milton Bradley Company. ... The Atari 2600, Sony PSOne, Nintendo Gamecube, and Xbox 360 A video game console is an interactive entertainment computer. ... 4k TRS-80 Color Computer from 1981, 26-3001 The Radio Shack TRS-80 color computer (also called Tandy Color Computer, or CoCo) was a home computer based around the Motorola 6809E processor and part of the TRS-80 line. ... The integrated circuit from an Intel 8742, a 8-bit microcontroller that includes a CPU running at 12 MHz, 128 bytes of RAM, 2048 byte of EPROM, and I/O in the same chip. ... The 68HC08 (HC08 in short) is a broad family of 8-bit microcontrollers originally from Motorola, now produced by Freescale Semiconductor. ... The 68HC11 (6811 or HC11 for short) is a microcontroller (µC) family from Freescale Semiconductor, descended from the Motorola 6800 microprocessor, and a subfamily of the 68h family. ... The 68HC12 (6812 or HC12 for short) is a 16-bit microcontroller family from Freescale Semiconductor. ...


Hitachi, Ltd. acted as a second source for many of Motorola's CPUs, and also produced its own derivatives including the 6301 and 6303, which could run 6800 code. These microprocessors also had a couple of extra instructions added to their instruction sets. It has been suggested that Hitachi Works be merged into this article or section. ...


Competitor MOS Technology came up with an architectural relative of the 6800, with its 6502 ('lawsuit compatible' MPU) and its successors. The 6502 did not have the 16 bit registers of the 6800, but had more addressing modes. The 6502 was used in many computers and game consoles during the late 1970s and early-to-mid-1980s (most notably the Atari 2600, Apple II, the Commodore PET, VIC-20 and Commodore 64, and the Acorn Electron/BBC Microcomputer), and the Nintendo Entertainment System or NES. MOS Technology, Inc. ... The MOS Technology 6502 is an 8-bit microprocessor designed by MOS Technology in 1975. ... The examples and perspective in this article or section may not represent a worldwide view. ... The Atari 2600, released in October, 1977, was the first successful video game console to use plug-in cartridges instead of having one or more games built in. ... The 1977 Apple II, complete with integrated keyboard, color graphics, sound, a plastic case and eight expansion slots. ... The PET (Personal Electronic Transactor) was a home-/personal computer produced by Commodore starting in the late 1970s. ... VIC-20 with accessories. ... The Commodore 64 is the best selling single personal computer model of all time. ... The Acorn Electron Acorn Electron BASIC - the first thing displayed when an unexpanded Electron is switched on The Acorn Electron was a budget version of the BBC Micro educational/home computer made by Acorn Computers Ltd. ... Top view of the BBC Micro The BBC Micro, affectionately known as the Beeb, was an early home computer. ... Nes is: A municipality in the county of Akershus in Norway, see Nes, Akershus. ...


Program model

 7 A
 7 B
15 X 0
15 PC 0
15 SP 0
 7 CCR
2*8 bits
16 bits
16 bits
16 bits
8 bits

A - Accumulator A
B - Accumulator B
X - Index register
PC - Program Counter
SP - Stack Pointer
CCR - Conditional Code Register


External links

  • 680x images and descriptions at cpu-collection.de
  • Instruction set summary
  • Java Applet Simulator of a simplified M6800 Microprocessor
List of Motorola/Freescale microprocessors
The 6800 family : 6809 (see also: Hitachi 6309)
68000 family : 68000 | 68008 | 68010 | 68012 | 68020 | 68030 | 68040 | 68060 | ColdFire | DragonBall
Low-cost variants: 68EC000 | 68EC020 | 68EC030 | 68EC040 | 68LC040
Pre-PowerPC RISC : 88000
Floating-point coprocessors : 68881, 68882
PowerPC family (as part of AIM) : PPC 7XX ("PowerPC G3") | PPC 7XXX ("PowerPC G4") | PPC 970 ("PowerPC G5")


This article was originally based on material from the Free On-line Dictionary of Computing, which is licensed under the GFDL. The following is a partial list of Freescale Semiconductor products, including products formerly manufactured by Motorola until 2004. ... 1 MHz Motorola 6809E processor, manufactured in 1983. ... Hitachi 63C09E, a 3MHz external clock version of the 6309 The 6309 is Hitachis CMOS version of the Motorola 6809 microprocessor. ... The Motorola 680x0/0x0/m68k/68k/68K family of CISC microprocessor CPU chips were 32-bit from the start, and were the primary competition for the Intel x86 family of chips. ... The 68000 grew out of the MACSS (Motorola Advanced Computer System on Silicon) project, begun in 1976. ... The Motorola MC68008 is a 8/16/32-bit microprocessor from the early 1980s. ... The Motorola MC68010 processor is a 16/32-bit microprocessor from Motorola, released in 1982 [1]. It is largely similar to the Motorola 68000 CPU with the exception of the addition of several instructions for breakpoint and register control (ccr instead of sr), as well as the ability to save... The Motorola MC68012 processor is a 16/32-bit microprocessor from the early 1980s. ... Motorola 68020 The Motorola 68020 is a microprocessor from Motorola. ... Motorola 68030 Processor from a Macintosh IIsi The Motorola 68030 is a 32-bit microprocessor in Motorolas 68000 family. ... The Motorola 68040 is a microprocessor from Motorola. ... The Motorola 68060 is a 32-bit microprocessor from Motorola, and is the successor to the Motorola 68040. ... The Freescale ColdFire is a 68k architecture microprocessor manufactured for embedded systems development by Freescale Semiconductor (formerly the semiconductor sector of Motorola). ... Motorola DragonBall Microprocessor Motorola/Freescale Semiconductors DragonBall is microprocessor design based on the famous 68000 core, but implemented as an all-in-one low-power solution for handheld computer use. ... Motorola 68EC000 controller The 68EC000 is a microprocessor from Motorola. ... The 68EC020 is a microprocessor from Motorola. ... The 68EC030 is a microprocessor from Motorola. ... The 68EC040 is a version of the Freescale 68040 microprocessor intended for embedded controllers. ... The 68LC040 is a low cost version of the Freescale 68040 microprocessor with no FPU. This makes it less expensive and draw less power. ... Reduced Instruction Set Computer (RISC), is a microprocessor CPU design philosophy that favors a smaller and simpler set of instructions that all take about the same amount of time to execute. ... The 88000 (m88k for short) is a microprocessor design produced by Motorola. ... This article or section is in need of attention from an expert on the subject. ... This article or section does not cite its references or sources. ... The Motorola 68881 was a floating-point coprocessor chip that was utilized in some computer systems that used the 68020 or 68030 CPU. The addition of the 68881 chip added substantial cost to the computer, but added a floating point unit that could rapidly perform floating point math calculations. ... IBM PowerPC 601 Microprocessor PowerPC is a RISC microprocessor architecture created by the 1991 Apple–IBM–Motorola alliance, known as AIM. Originally intended for personal computers, PowerPC CPUs have since become popular embedded and high-performance processors as well. ... AIM was an alliance formed in 1991 between Apple Computer, IBM and Motorola to create a new computing standard based on the PowerPC architecture. ... 300 MHz Motorola PowerPC 750 processor with off-die L2 cache on the CPU module of a PowerMac G3. ... PowerPC G4 is a designation used by Apple Computer to describe a fourth generation of PowerPC microprocessors. ... PowerPC 970 In computing, the PowerPC 970, PowerPC 970FX, and PowerPC 970MP, also known as PowerPC G5, are 64-bit processors in the PowerPC family from IBM, which was introduced in 2002. ... The Free On-line Dictionary of Computing (FOLDOC) is an online, searchable encyclopedic dictionary of computing subjects. ... GNU logo (similar in appearance to a gnu) The GNU Free Documentation License (GNU FDL or simply GFDL) is a copyleft license for free content, designed by the Free Software Foundation (FSF) for the GNU project. ...


  Results from FactBites:
 
Motorola 6800 - Wikipedia, the free encyclopedia (250 words)
The 6800 is a microprocessor produced by Motorola and released shortly after the Intel 8080 in 1975.
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.
Motorola 6809 - Wikipedia, the free encyclopedia (737 words)
The 6809 was a major advance over both its predecessors, the in-house Motorola 6800 and the latter's near clone the MOS Technology 6502.
The 6809 was source-compatible with the 6800, even though the 6800 had 78 instructions and the 6809 only had 59.
It is considered to be the 'moral precursor' to the Motorola 68000 family of processors, though 68K design actually overlapped the 6809 project in time.
  More results at FactBites »

 
 

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