SpartaDOS X (or SpartaDOS 4.0) is a disk operating system for the Atari 8-bit family of computers, that closely resembles MS-DOS. It was developed and sold by ICD, Inc. in 1987-93.

Ten years later SpartaDOS X considered abandonware has been picked up by its enthusiasts, and developed further. These unofficial revisions, incorporating many of the utilities written since 1992, cleaning many identified problems and including numerous improvements, are:

• v4.31 (2005)
• v4.39RC (2006)
• v4.40 (a leaked-out beta, 2006)
• v4.41 (Feb. 2008)
• v4.42 (Dec. 2008)
• v4.4.3 (Apr.2011)
• v4.4.4 (Jun.2011)
• v4.4.5 (Nov.2011)

The new SpartaDOS X 4.45 runs on the following hardware platforms:

• intSDX128
• intSDX128 “flash”
• Maxflash 1Mb
• Maxflash 8Mb (contains MAN on-line help)
• Altirra and Atari800 emulators
• Turbo Freezer 2005 (contains MAN on-line help, use with Freezer ROM only)
• SIC! Cartridge (256k version contains MAN on-line help)
• IDE Plus 2.0 (contains MAN on-line help)
• Ultimate 1MB (contains MAN on-line help)

SDX Toolkit:

• Set of additional programs, drivers and utilities
• Set of SDX command descriptions for MAN utility (excerpts from the User’s Manual).

SDX images for SIDE:

• Customized SDX images with SIDE driver are available at Jonathan Halliday’s website.

Dowload: SpartaDOS X v4.45 (989)

 source: sdx.atari8.info wikipedia