Atari 1200XL
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Introduced  Late 1982
Discontinued  June 1983
Release Price  

 

        In 1982 the Home Computer Market was in full swing. Competition was heating up and Commodore was killing the competition with it's low cost VIC-20 computer and in January at the winter CES had just demonstrated their latest computer, the Commodore 64.

        Atari management knew that in order to survive in this hostile environment they would have to replace the aging and expensive to produce 400/800 series computer line.

        Their answer was the sleek modern looking 1200XL. A reduced cost single board computer that would put Atari in a good position to compete with Commodore. It featured 64K of RAM, 16K of ROM, a new Operating System complete with built in diagnostic programs, a keyboard that is completely redefinable, and programmable function keys.

        But in order to bring some of these advanced features to the 1200XL, Atari engineers had to make some sacrifices to the 1200XL. These sacrifices led to compatibility problems with some programs written for the 400/800 computer platforms. For instance: The engineers felt that 2 joystick ports were sufficient for a personal computer, so they eliminated ports 3 & 4 and used the hardware addresses to control OS functions such as switching BASIC in and out of memory and adding the HELP key function of self tests. This led to compatibility problems with programs that require that these ports be available.

       Other problems which probably led to the early demise of the 1200XL was the omission of an expansion port found on just about any other competing computer in this era. I think the Atari management misjudged the Home Computer Market of 1982. I believe they felt that consumers wanted a computer that was basically an 'appliance computer' in that you plug it in run an application or game with no abilities beyond what comes out of the box.

        But the market of 1982 was still young and primarily driven by hobbyists who liked to tinker and expand their computers. The market would not mature for another 2 years, when in 1984 Apple Computers introduced the world to the Macintosh, an all in one non-expandable computer. Then 4 months later introduced their own version of the 'appliance computer' the Apple IIc. This time the market was ready for it and the IIc became a very successful computer for Apple.

        But in 1982 the Atari 1200XL was a flop. It lasted less than a year before it was quietly dropped and replaced by the 600XL/800XL line of computers which addressed the failings of the 1200XL.

       The Atari 1200XL in this exhibit was added to the museum on February 21, 2001 and was purchased on Ebay

 

System Architecture

 

Memory

 
Microprocessor MOSTEK 6502C Standard on system board 64k
Clock speed 1.79 MHz Maximum on system board 64k
Bus type Atari proprietary Maximum total memory 64k
Data bus width 8 - bits Memory speed and type  
Address bus width 16 - bits System board memory socket type  
Interrupt levels N/A Number of memory module sockets  
DMA channels N/A Memory used on system board  

Standard Features

 

Disk Storage

 
ROM size 16k Internal disk and tape drive bays none
Optional math coprocessor no Standard floppy drives Cassette or 5.25 floppy drive
Parallel port type no Optional floppy drives: external
RS232C serial ports no * 5 1/4 inch 160k yes
Mouse ports no * 5 1/4 inch 1.2MB no
UART chip used N/A * 3 1/2 inch 720k no
Maximum speed N/A * 3 1/2 inch 1.44MB no
CMOS real time clock no * 3 1/2 inch 2.88MB no
CMOS RAM no Hard disk controller included no

Video & Graphics

 

Sound

 
Graphics Processor 'Antic'  Sound Interface device 'Pokey'
Screen size - Col x Rows 40 x 24 Sound generation 4 voices
Resolution - Colors/High 2 / 320 x 192 ADSR capable no
Resolution - Colors/Low 16 / 80 x 192    
Max colors 128 Programming language  
Sprites or Missiles 4 Built in language no
    Built in M L monitor no

Expansion Slots

 

Keyboard Specs.

 
Total adapter slots 0 Number of keys 55
Number of 8/16/32 bit slots 0 / 0 / 0 Upper/lower case yes / yes
I/O RF output cable to TV Keyboard cable length N/A
I/O 5 pin DIN output to color monitor    
I/O 2-9 pin D-plug joystick ports    
I/O 13 pin  D-plug peripheral port    
I/O 1-cartridge slot    
       

Physical Specs.

 

Environmental Specs.

 
* Height   2 1/2 inches Operating voltage @ 60 Hz 120 VAC
* Width   15 inches Maximum power supplied  50  Watts
* Depth   12 1/2 inches Power supply output - volts   9 VAC
* Weight  5 1/4 pounds Power supply output - amps   31 VA