FreeDOS Kernel; An MS-DOS Emulator for Platform Independence and Embedded Systems Development

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Book Description
Pat Villani explains the construction and operation of DOS-C, the fully functional, portable, single-threaded operating system written in C and distributed by the FreeDOS community on the Internet. DOS-C is a single large kernel with a layered architecture, is non-multitasking with a large number of system calls similar to the MS-DOS APIs, and employs a minimum of assembly language. FreeDOS uses the de facto DOS hardware standards and provides binary compatibility for MS-DOS applications. It compiles with Borland C, Microsoft C, and other C cross-compilers without using their run-time libraries. Villani provides C-to-assembly interface routines where assembly is used. A DOS clone has value as an educational tool, in embedded systems applications, on non-Intel platforms, in establishing independence from Microsoft, and as an extension to a commercial DOS. Villani offers suggestions on creating a development environment using common, low-cost tools and provides clues on where portability issues are most problematic and how to make code portable. The book and companion disk include the full source code and support files for an 80x86 kernel.

Synopsis
Free DOS Kernel explains the constructions and operations of DOS-C, which was developed by the book's author, Pat Villani. DOS-C is a highly portable operating system, written in C, that provides systems calls similar to MS-DOS. The book and companion disk include full source code for DOS-C and support files.

About the Author
Pat Villani has developed applications ranging from avionics and guidance to computer peripherals. His special interests are C applications and embedded control systems. He received his Master of Science in Electrical Engineering from the Polytechnic Institute of New York.

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