Editing Atari 1040ST (section)

== TOS Versions ==

The 1040ST shipped with various TOS versions depending on production date and region:

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{| class="wikitable styled-table"
! TOS Version !! Date !! Notes
|-
| 1.00 || 1985 || Earliest ROM version. Known bugs in desktop and file system. Sometimes called "old TOS." Shipped in six ROMs on early boards.
|-
| 1.02 || 1987 || Most common version in 1040STF/STFM units. Bug fixes. Also known as "TOS 1.2" in some documentation. Shipped in two or six ROMs depending on board revision.
|-
| 1.04 || 1989 || "Rainbow TOS." Numerous bug fixes, improved file selector, DOS-compatible formatting. Some older software incompatible. Also fitted to late STFMs and the STacy.
|-
| 2.06 || 1991 || Available as a user upgrade. Enhanced GEM desktop, 1.44 MB HD floppy support, IDE boot capability, cold-boot memory test. Requires ROM adapter on most ST boards.
|}