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M > MITS  > Altair 680   

Altair 680

The Altair 680 appeared about one year after the successful Altair 8800 was launched. With this model, MITS attempted to offer a new system based on the well known Motorola 6800 processor and then cover a large market share in small computer business.

The computer was available in kit or assembled form, It was smaller than the 8800 but kept the same design of front panel and switches. It featured 1 KB of RAM (4 times the 8800 RAM) and 1 KB of ROM with support for a serial terminal and punch tape reader.

For $420, customer got an assembled system with no display and no mass storage devices. program had to be entered each time the system was switched on using binary address and data switches. At power off, all of the RAM content was definitly lost. In fact, in order to get a really usable system with terminal or Teletype and tape or floppy disc storage, user had to invest about $2000, a fortune at the time.

First available programming language was the BASIC 2.0 the young Micro-Soft company ported from the Intel 8080 to the 6800.

As the Altair 680 wasn't the first and cheaper 6800 based system, it didn't meet a great success. It was followed by the 680B and the 680B Turnkey where all front panel switches were replaced with an unique power key.

Please consider donating your old computer / videogame system to or one of our partners from anywhere in the world (Europe, America, Asia, etc.).


Did you work in Albuquerque? My dad worked for MITS. He is Don Saunier.

Monday 1st June 2015
Cristina Saunier (San Francosco, CA)

Some peripherals were not mentioned in the description. The 680b had a 16Kx8 bit static RAM, 16Kx8 bit dynamic RAM, Audio Cassette interface, Process Control interface, Universal I/O interface, A/D-D/A interface, and 5.25" Mini Disk Interface w/Basic. I used to work at MITS in the 70's.

Wednesday 20th September 2006
Ron Scales (Tucson AZ)


NAME  Altair 680
TYPE  Professional Computer
YEAR  October 1975
KEYBOARD  27 address, data and control switches
CPU  Motorola 6800
SPEED  500 KHz.
TEXT MODES  Depends on the video terminal used
SIZE / WEIGHT  28 (W) x 28 (D) x 12 (H) cm.
I/O PORTS  Serial port
BUILT IN MEDIA  None in basic version
POWER SUPPLY  Built_in power supply unit
PERIPHERALS  Memory board, I/O board
PRICE  Kit form: about $300, assembled: $420

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