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D > DATAPOINT CORPORATION > Datapoint 2200   

Datapoint 2200

In the very late 1960's, 2 professors at Case Western Reserve University in Ohio came up with the idea of a high density integrated circuit which would be programmable. Its purpose would be to a programmable/adaptable physical interface. They took this circuit design to various IC manufacturers and were turned down by all of the existing IC manufacturers. The reason? The chip was too specialized and would never have enough widespread applicability to be financially worth developing.

Having failed to convince any IC manufacturers, but still believing in the concept these 2 professors pressed on and went looking for manufacturers who would have an application for the new chip. They found such a firm in Computer Terminal Corporation (CTC), which made a variety of lower cost computer terminals which were compatible with the various computer companies. CTC was interested in the chip because it presented a way to make one terminal that could be programmed to behave like and handle the protocols of a variety of different computer manufacturers. [This was the days of Snow White (IBM) and the seven dwarfs: Sperry, Burroughs, Honeywell, GE, Control Data Corporation....] CTC agreed to pay two different chip makers to produce the chip. Both chip makers decided to use a new technology, called PMOS, to produce the chip. CTC agreed to the use of the new technology, but was concerned about speed to market, so they set a time limit on the chip delivery. Skip ahead a year or so.

Both chip makers have encountered new technology problems with PMOS and have failed to meet the CTC deadline. So the contracts are canceled and CTC builds the chip via discrete TTL logic and puts it into a programmable desktop terminal called the Datapoint 2200.

One of the chip makers, Texas Instruments, shelves the project. The other chip maker determines that they are approximately 85% complete on the project and that while the project will never break even, it will cost less to finish the chip, put it on the market and recover some of the costs. They do this and about a year later, a bell goes off in the financial department. The chip, called an Intel 8008, has broken even and is now making a profit. So the chip manufacturer, Intel, goes on a field trip to visit customers who are buying the chip, to find out what it is being used for. In so doing, the customers have lots of suggestions on ways to improve the chip, which Intel does and thus the Intel 8080 is born.

In the meantime, back at CTC, they have introduced the Datapoint 2200 to the market. It becomes an extremely successful product. So much so, that CTC changes it's name to Datapoint Corporation. They go on to invent another new technology to connect all of their low cost computers together. It was called a Local Area Network (LAN) and was the most popular LAN until around 1980. While the initial Datapoint 2200 did not have a microprocessor in it, it had the programmable equivalent of an Intel 8008 and it funded the initial development of the first microprocessor. Thus it is the first microprocessor based computer.

The Datapoint 2200 had a small built in CRT screen, keyboard and 2 cassette decks. There was a run light and 2 other lights on the keyboard. When the machine halted, you could not tell where in the program it had done so. So you put in the O/S cassette and rebooted. You then did a memory dump and tried to deduce what had went wrong. Primitive by today's standards, it was the first computer on a desktop.

There were also an optional disk drive using Shugart 8" floppies, single-sided, single-density. It was the first commercial computer to include them! Languages included Databus and Datashare ("COBOL-like" business computer languages, interpreted to allow multiple 80 character by 24 row dumb CRTs to share tiny partitions of RAM memory in the main system unit), a Basic interpreter, and RPG II compiler.

Datapoint is still in business, but is only a small fraction of their size in the mid 1970's

Thanks to Tom Meserole for all this info. He started programming DataPoint 2200 systems in 1972 while in college!

We are seeking information and pictures of all other Datapoint systems!



i had the pleasure of working @the disk works in mt.view,as the equipment maintenance mechanic from aprox 82-87,i maintained the westec single side disk polishers,the strasbaugh 6sr4,the plating lines and all related equipment .,in the end ,our division was absorbed by xebec corp.and i was included in a group that went to "information memories corp",another pilot type plating set up..most colorful character-co worker,Mel Dike

Friday 6th May 2011
dave_schummers (california)

I worked at Datapoint in test engineering, and did failure analysis on the production floor. It was a challenge to troubleshoot the 2200''s microprocessor made of discrete components. Working in machine language became second nature. The place was a circus and things changed daily, it was a fun place to work.

Monday 4th April 2011
Richard DesChenes (Florida)

I first became acquainted with Datapoint while working as a Computer Operator arond 1975 in New Jersey when the Boss brought in a Datapoint. I had gone to Programming School and told him that I could Program the Machine. He gave me the Job. It was one of the Machines that used Cassettes for I/O. The manual said "Go have a cup of coffee while the machine copied your work from one Cassette to another". I was writing Software to transfer Hospital Census Data from the Hospital to our Computer Site for Processing. By that time they had a Datapoint System that would write to a Computer Tape and I added a routine that played "Shave $ Haircut Six Bits" when the tape was ready to be transfered to the Univac 9300. Later on I was asked to produce a Program that would allow up to 33 lines of input for a Hospital Admissions Form. Since the Machine only allowed 11 Lines I had to DUMP the 8K of Memory to the Printer then Decode it and reassemble it into a System that Mimic''d DataBus. I even added interrupt control so one could back up fields to re-enter them. It took me 6 months but it ended up on the ROUND file. I worked with Datapoints until 1979 when I left New Jersey and moved to Wisconsin.

Wednesday 9th March 2011
Robert J. Stevens (Menomnee Falls, Wisconsin, USA)


NAME  Datapoint 2200
MANUFACTURER  Datapoint Corporation
TYPE  Professional Computer
YEAR  1971
KEYBOARD  Full stroke keyboard + numeric keypad
CPU  No real microprocessor but discrete TTL logic (Intel 8008 equivalent)
RAM  From 16 KB to 64 KB max.
ROM  Unknown
TEXT MODES  12 x 80
COLORS  Green & black (monochrome built-in display)
SOUND  beeper located within the keyboard
SIZE / WEIGHT  aprox 2' x 2' X 11''
I/O PORTS  RS 232, LAN connector, printer connector
OS  Datapoint O/S (cassette/storage drum based O/S)
POWER SUPPLY  Fed via 110 and/or 220 volts
PRICE  Unknown

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