Atari 810 Disk Drive  

 

 Technical Documents

     810 Owners Manual

     Atari Master Diskette II

     810 Side Board Schematics

     810 Read Board Schematics

 

 

  

 

 

 

 

The Atari 810 disk drive was introduced at the unveiling of the Atari 400/800 computers at the Winter CES (Consumer Electronics Show) in Las Vegas.  January 1979.

There are two versions of the Atari 810. The MPI version which has a door handle that swings up and you slide in and out the 5.25" diskette.  The other was the Tandon version (shown above) which has a spring loaded up/down door that when opened would eject the diskette out about 1 to 2 inches out of the drive opening for easy removal.

The Disk drive is a SIO device with 2 ports on the rear of the unit to allow "Daisy Chaining" of other peripherals onto the SIO bus.   Up to 4 Atari 810's could be connected together, each drive having its own unique Drive Number ID from 1 to 4.

On the rear of the 810 next to the Power connector is a round window opening, inside of the opening are 2 slider switches, one behind the other.  Visual directions for setting the switches shows how to set the drive number of the disk drive.  Drive number 1 is always required to allow the computer to have a disk drive to "boot" from to load the DOS (Disk Operating System) that allows the Atari 400/800 computers to access and use the diskettes.

The drives are single sided/single density disk drives that can store 90K of data (88K once the diskettes are formatted.)

 

 

 

 

Work in Progress, updated 3/13/2019