< Atari 810 Disk Drive The Atari 810 disk drive was the original drive introduced for use with the Atari 400 and 800 computers. It is a full-height, single sided, single density drive and capable of holding 90k. It plugs directly to the I/O bus of the computer, and requires no seperate controller and a number of them can be daisy chained together.

The 'Happy' upgrade for these drives comprised of single chip added to the drive, and software run during the boot-up of the Atari 8bit machine. It dramatically improved the speed of the drive, raising the transfer rate to 52k vice the standard 19.2k, as well as allowed the drive to copy nearly any 810-format diskette. The software for the upgrade went through many revisions during it's production. Needless to say, this product was a favorite for copying commercial software, which often used on-disk copy protection.

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