Abstract
The Turbo C programmers are familiar with few basic hooks that Turbo C provides for communicating with DOS and the ROM BIOS. This chapter discusses these hooks. A powerful library of functions is being developed that will allow the people to perform fast video I/O operations. Together, DOS and the ROM BIOS perform all the operating system functions necessary to support the personal computer (PC), such as managing directories and files, displaying text and graphics, and loading and executing programs. They also perform tasks that one is generally not aware of such as determining the type of equipment installed in a PC or formatting a hard disk. The ROM BIOS houses all of the low-level routines for controlling I/O operations. The DOS routines operate at a higher level than the ROM BIOS routines. A few of the DOS routines make calls to the ROM BIOS.
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