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abmaze4 is a 16-bit DOS utility by Viacheslav Komenda that generates mazes using the Aldous-Broder algorithm and renders the results as ASCII output. The Aldous-Broder method is a random-walk technique in which the generator moves from cell to cell across the grid, carving passages whenever it enters an unvisited cell, continuing until every cell has been visited and a complete, uniform spanning maze has been produced. In abmaze4 this algorithm has been implemented natively in 16-bit code, meaning the program is designed to run directly within a DOS environment or an emulator capable of executing legacy real-mode software, rather than as a modern 32-bit or 64-bit application. Because the output is plain ASCII text, the generated mazes can be displayed in a terminal, redirected into files, or printed without requiring any graphics support, making the tool simple to inspect, share, and reuse in other text-based contexts. Beyond its primary purpose as a maze generator, the software serves a practical secondary use case: it provides a convenient way to test NTVDM (NT Virtual DOS Machine) support on 32-bit editions of Windows 10, since running a genuine 16-bit DOS program is a straightforward check of whether that compatibility subsystem is present and functional. As a small, focused tool, abmaze4 fits naturally into the category of DOS utilities and programming or algorithm demonstrations, and it may interest users working with retro computing, algorithm visualization, or compatibility testing. The current and only published version is 20230423, released in April 2023 as indicated by its date-based numbering scheme, and the catalog lists a total of one available version for this title. The software is distributed by its author, Viacheslav Komenda, and its minimal scope and text-based interface reflect a deliberate emphasis on simplicity and portability within the constraints of a 16-bit DOS environment.
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