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Add 221B Baker Street - #668

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Add 221B Baker Street#668
mark-wd wants to merge 1 commit into
PureDOS:mainfrom
mark-wd:add-221b-baker-street

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@mark-wd

@mark-wd mark-wd commented Aug 12, 2026

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Adding 221B Baker Street (1987) (Datasoft)

Source Media

Installation Options

No installation is required. The TDC file set runs from the root of C:. Without the DOSC, run 221.EXE. The original case-disk prompts can be dismissed with Enter because the program and case files are present together.

Official Patches

No official patch is necessary.

DOSC Contents

  • Auto-starts 221.EXE
  • Selects EGA graphics
  • Selects the B / 6 MHz IBM AT-compatible speed profile
  • Dismisses the initial EGA Case Disk prompt
  • Sets CPU year to 1987 and fixed CPU cycles to 300

Installation Variants

No installation-media variant is provided; the source is a flat TDC file set.

Digital Store Variants

The game is not available on GOG or Steam.

Unofficial Patch Variants

No unofficial patch variant is included.

Testing

MakePureDOSDAT generated 66 file records. DoDAT rebuilt the DOSZ from the TDC archive and SHA1-verified all 66 files. The game was hand-tested in EGA mode at fixed 300 cycles; all case selections load and gameplay works.

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