The 6800 was an 8-bit microprocessor designed and first manufactured by Motorola in 1974. The MC6800 microprocessor was part of the M6800 Microcomputer System 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.
Date : 1974
The 6800 architecture and instruction set were influenced by the then popular Digital Equipment Corporation PDP-11 mini computer. The 6800 has a 16-bit address bus that could 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 192 opcodes. The original MC6800 could have a clock frequency of up to 1 MHz. Later versions had a maximum clock frequency of 2 MHz.
The first working MC6800 chips were produced in February 1974 and engineering samples were given to select customers. Hewlett Packard in Loveland, Colorado wanted the MC6800 for a new desktop calculator and had a prototype system working by June. The MC6800 used a new single voltage N-channel MOS process that proved to be very difficult to implement. The M6800 microcomputer system was finally in production by November 1974.
THE Motorola Kit D2 (2 Units one with keypad) consisted of:
Motorola Microcomputer Module 84DW6232X01
Motorola Keyboard/Display Module 84DW6233X01
Manufacturer : Motorola
This exhibit has a reference ID of CH16764. Please quote this reference ID in any communication with the Centre for Computing History.
Click on the Image For Detail