RxDOS
Fast industrial strength DOS compatible RTOS, supports huge disk drives, FAT32 volumes, Windows 95/98 long filenames, coded in Assembly, used mostly in embedded systems and similar uses. [Open Source, GPL]
http://sourceforge.net/projects/rxdos/
RxDOS, Source Code DOS Clone
Brief description, links, book link by page and book author, Mike Podanoffsky.
http://world.std.com/~mikep/rxdos-page.html
Dissecting DOS: A Code-Level Look at the DOS Operating Syste
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By Michael Podanoffsky; Addison-Wesley, 1994, ISBN 020162687X, has CD-ROM. Explores DOS structure, function from programmer view, overall architecture, command structure, code-level details of vital actions. [Amazon.com]
http://www.amazon.com/exec/obidos/ASIN/020162687X
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