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Microsoft KB Archive/103554

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Knowledge Base


Running MS-DOS-Based Games with DoubleSpace

Article ID: 103554

Article Last Modified on 12/2/1999



APPLIES TO

  • Microsoft MS-DOS 6.2 Standard Edition
  • Microsoft MS-DOS 6.22 Standard Edition



This article was previously published under Q103554

SYMPTOMS

This information applies to both Microsoft DoubleSpace and Microsoft DriveSpace. For MS-DOS 6.22, use DRVSPACE in place of DBLSPACE for commands and filenames.

Some MS-DOS-based games may not display video output correctly when the DoubleSpace component (DBLSPACE.BIN) is loaded.

CAUSE

The DoubleSpace decompression code requires the buffer it is reading into to be readable so that it can scan back for expanding repeated strings. Some games read directly into video RAM, which is not guaranteed to be readable.

WORKAROUND

To work around this problem, install your MS-DOS-based games on your uncompressed host drive. Then, when you start MS-DOS, press CTRL+F5 or CTRL+F8 when the "Starting MS-DOS" prompt is displayed to start your computer without loading DBLSPACE.BIN.


Additional query words: 6.20

Keywords: KB103554