A programmer's guide to creating faster, more powerful, more responsive C programs. Written for programmers using C on the IBM line of personal computers, this book contains techniques for improving the performance of C programs by means of speed optimization, direct access of ROM BIOS, and direct access to hardware. Dozens of sophisticated MS-DOS techniques are illustrated in the areas of graphics, communications, sound generation, and disk access. The authors also include all you need to know about the MASM assembler, linker, and 4.0 C-to-assembly language interface rules.