SLOS-DOS: Difference between revisions
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Steven Lawrance's Operating System (SLOS), also known briefly as Steven Lawrance's Operating Program (SL-OP), was a small interpreted toy operating environment written in {{Tech:BASIC}} for {{Tech:DOS}}. The primary motivation for writing this was to have an environment that supported [http://en.wikipedia.org/wiki/Long_filename long file names]. This was written in 1993 -- two years before [http://en.wikipedia.org/wiki/Microsoft Microsoft] released native long file name support in a consumer operating system with [http://en.wikipedia.org/wiki/Windows_95 Windows 95]. | Steven Lawrance's Operating System (SLOS), also known briefly as Steven Lawrance's Operating Program (SL-OP), was a small interpreted toy operating environment written in {{Tech:BASIC}} for {{Tech:DOS}}. The primary motivation for writing this was to have an environment that supported [http://en.wikipedia.org/wiki/Long_filename long file names]. This was written in 1993 -- two years before [http://en.wikipedia.org/wiki/Microsoft Microsoft] released native long file name support in a consumer operating system with [http://en.wikipedia.org/wiki/Windows_95 Windows 95]. | ||
SLOS was primarily distributed on the [http://www.flightsim.com/arcanum/fs.htm Contrails] [http://en.wikipedia.org/wiki/Bulletin_board_system BBS] in [http://en.wikipedia.org/wiki/Euless%2C_Texas Euless, Texas]. | SLOS was primarily distributed on the [http://www.flightsim.com/arcanum/fs.htm Contrails] [http://en.wikipedia.org/wiki/Bulletin_board_system BBS] in [http://en.wikipedia.org/wiki/Euless%2C_Texas Euless, Texas]. It is now distributed from this web site. | ||
==Download== | |||
'''[https://www.moonlightdesign.org/steve/programs/slosdist1.exe Download SLOS-DOS]''' | |||
'''[https://www.moonlightdesign.org/steve/programs/sloswin.zip Download SLOS-Win]''', a [[SLOS-Win|Windows version of SLOS]] | |||
==Scripting Language== | ==Scripting Language== | ||
Revision as of 05:56, 8 October 2007
Steven Lawrance's Operating System (SLOS), also known briefly as Steven Lawrance's Operating Program (SL-OP), was a small interpreted toy operating environment written in QBASIC for DOS. The primary motivation for writing this was to have an environment that supported long file names. This was written in 1993 -- two years before Microsoft released native long file name support in a consumer operating system with Windows 95.
SLOS was primarily distributed on the Contrails BBS in Euless, Texas. It is now distributed from this web site.
Download
Download SLOS-Win, a Windows version of SLOS
Scripting Language
SLOS executes script files having a "exc" file extension in an interpreted manner. Because this interpreter is running within the BASIC interpreter, execution speed is noticeably slow.
Limitations
SLOS's scripting environment contains a large list of limitations, and some are expressed in the following list:
- The screen always has a light-blue background with a white foreground
- Conditional expressions are only allowed in a few operations
- Programs get only one number variable and one string variable, which is a huge limitation for all but trivial programs
- Loading and saving data files within a program is limited to saving the program's two variables
- Looping can only be done with the only number variable that you have