Editing Tandy 1000 (section)

=== Operating systems and environments ===
Tandy shipped PCs with their own customized version of [[MS-DOS]], which are compatible with Tandy graphics and keyboard. The most current version of MS-DOS for Tandy 1000 is DOS 3.22. Tandy 1000s came shipped with one of several varieties of [[DeskMate]], the company's own [[graphical user interface|GUI]] productivity software suite.

There may be compatibility issues with later versions of DOS such as DOS 5 and DOS 6. Until the 1000 RLX, Tandy 1000s are typically limited to 640&nbsp;KB main memory, and non-Tandy versions of DOS often reduce the memory available for applications and games. In addition, the hardware detection routine for the installer of Microsoft MS-DOS 6 can corrupt the serial EEPROM of Tandy 1000 HX machines.<ref name="dos60ref">{{Cite web |title=MS-DOS 6.0 UPGRADE PACKAGE |url=ftp://ftp.oldskool.org/pub/tvdog/tandy1000/documents/dos60.txt |access-date=2023-05-30 |archive-date=2022-08-06 |archive-url=https://web.archive.org/web/20220806054244/ftp://ftp.oldskool.org/pub/tvdog/tandy1000/documents/dos60.txt |url-status=bot: unknown }}</ref>

Tandy 1000s can work with [[Windows 1.0]], [[Windows 2.0|2.0]], and [[Windows 3.0|3.0]] but not [[Windows 3.1x|3.1]], with the exception of the RLX which can run Windows 3.1 in Standard mode,<ref name=TVDogPics>{{Cite web|url=http://www.oldskool.org/guides/tvdog/RLRLX.html|title = Tandy 1000RL and RLX Pictures}}</ref> and the RSX which fully supports Windows 3.1 in 386 Enhanced mode.<ref name=TVDogPics />