For the 16-bit microprocessor introduced in 1979, see Motorola 68000.
Motorola 6800
Motorola MC6800 microprocessor
General information
Launched
1974; 50 years ago (1974)
Common manufacturer(s)
Motorola
Performance
Max. CPU clock rate
1 MHz to 2 MHz
Data width
8
Address width
16
Architecture and classification
Instruction set
6800
Number of instructions
72
Physical specifications
Transistors
4,100
Package(s)
40-pin DIP
History
Successor(s)
Motorola 6809
Motorola 68000
MOS 6502
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[1]) 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.[2][3]
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.[4][5]
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.[6]
The 6800 was popular in computer peripherals, test equipment applications and point-of-sale terminals. It also found use in arcade games[7] and pinball machines.[8] 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. Some MC6805 models integrated a Serial Peripheral Interface (SPI).[9] The Motorola 6809 was an updated compatible design.
^Puckett, Dale (1981-04-13). "68XX's Family Is Extended". InfoWorld. 3 (7). CW Communications: 46–47 – via Google Books.
^"Motorola joins microprocessor race with 8-bit entry". Electronics. 47 (5). New York: McGraw-Hill: 29–30. March 7, 1974.
^"Microcomputer system runs on one 5-V supply". Electronics. 47 (26). New York: McGraw-Hill: 114–115. December 26, 1974. "Motorola's M6800 microcomputer system, which can operate from a single 5-volt supply, is moving out of the sampling stage and into full production." The small-quantity price of the MC6800 is $360. The MC6820 PIA cost $28.
^M6800 Microcomputer System Design Data. Phoenix AZ: Motorola. 1976.
^Daniels, R. Gary; William C. Bruce (April 1985). "Built-In Self-Test Trends in Motorola Microprocessors". IEEE Design & Test of Computers. 2 (2). IEEE: 64–71. doi:10.1109/MDT.1985.294865. S2CID 22719798. "… MC6800, which was introduced in 1974. The device was built in six-micron NMOS technology with about 4000 transistors."
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 Motorola6800 family, M6800 family, or 68xx) was a series of 8-bit microprocessors and microcontrollers from Motorola that began with the 6800 CPU...
and introduced in 1978. Although source compatible with the earlier Motorola6800, the 6809 offered significant improvements over it and 8-bit contemporaries...
for MOS Technology. The design team had formerly worked at Motorola on the Motorola6800 project; the 6502 is essentially a simplified, less expensive...
microcontroller family introduced by Motorola Semiconductor in 1984 (later from Freescale then NXP). It descended from the Motorola6800 microprocessor by way of...
6800 may refer to: Electronic technology Motorola6800, a microprocessor GeForce 6800, a series of graphics cards from Nvidia Nokia 6800 series, mobile...
production, the 68000 architecture is still in use. Motorola's first widely produced microprocessor was the 6800, introduced in early 1974 and available in quantity...
applications. The 6800 was the basis for the more popular MOS Technology 6502 which was made by former Motorola employees. That same year, Motorola sold its television...
Quakertown, Pennsylvania. He was a major contributor to the design of the Motorola6800 8-bit microprocessor and was part of the team led by Chuck Peddle that...
(Qasar DOS), the Motorola6800-based operating system of the Fairlight CMI digital sampling synthesizer series, based on the MDOS (Motorola DOS) Seattle Computer...
computers during the 1980s. Originally intended for designs based on the Motorola6800 CPU and given a related part number, it was more widely used alongside...
changed dramatically in 1975. Several of the designers of the Motorola6800 left Motorola shortly after its release, after management told them to stop...
labeled CISC in many academic publications[citation needed] include the Motorola6800, 6809 and 68000 families; the Intel 8080, iAPX 432 and x86 family; the...
Electronic Music, Furse built a digital synthesizer using two 8-bit Motorola6800 microprocessors, and the light pen and some of the graphics that would...
The MEK6800D2 was a development board for the Motorola6800 microprocessor, produced by Motorola in 1976. It featured a keyboard with hexadecimal keys...
instructions. The IBM Series/1 minicomputer uses big-endian byte order. The Motorola6800 / 6801, the 6809 and the 68000 series of processors use the big-endian...
to champion such a design to complement the $300 Motorola6800. His efforts were frustrated by Motorola management and he was told to drop the project....
real-time kernel for the Motorola6800 processor, and was asked by Motorola to develop what turned into BASIC09 for the then-new Motorola 6809 processor. Having...
computer based on the Motorola6800. A high school friend of Allen and Gates, Ric Weiland, was hired to convert the 8080 BASIC to the 6800 microprocessor. David...
first known microprocessor-based portable computer. It was based on the Motorola6800. Constructed in a Samsonite suitcase approximately 20 by 30 by 8 inches...
developer kit for the 6502, widely used in a number of projects Motorola MEK6800D2 Motorola6800 1976 complete board MPT8080 Microtutor Intel 8080 1977 complete...
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