Master operation system development. FreeDOS Kernel explains the construction and operation of Pat Villani"s DOS-C - a highly portable, single threaded operating system. Written in C and with system calls similar to MS-DOS, the FreeDOS kernel provides an Teach yourself the essentials of operating system design and development with this guide to FreeDOS -- a highly portable single threaded OS! You"ll learn about kernel architecture, file systems, memory management, the API, and the command line interpreter. FreeDOS is an excellent source code base for experimenting.