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)
• v4.43 (Apr.2011)
• v4.44 (Jun.2011)
• v4.45 (Nov.2011)
• v4.46 (Jan.2013)
• v4.47 (Feb 2015)

The new SpartaDOS X 4.47 runs on the following hardware platforms:

• intSDX128 and intSDX128 “flash”
• IDE Plus 2.0 interface (*)
• Maxflash 1Mb
• Maxflash 8Mb (*)
• Maxflash MyIDE+Flash
• MyIDE II
• SIC! Cartridge 256k (*)
• SIC! Cartridge 128k
• SIDE HDD cartridge (*)
• SIDE2 HDD cartridge (*)
• Turbo Freezer 2005 (*) (**)
• Ultimate1MB (*)
• Incognito board (*) (***)
• Altirra and Atari800 emulators

(*) – includes MAN on-line help
(**) – use with Freezer ROM only
(***) – compatible with Ultimate1MB images

Dowload:

• SpartaDOS X 4.47 with Toolkit (1259)

source: sdx.atari8.info wikipedia