A knowledge of the Commodore 64 kernal software and the hardware with which it interacts is essential for programmers wishing to make full use of the machine's capabilities. The kernal software provides the interface between the user, the BASIC interpreter and the electronics - and a thorough knowledge of its functioning gives the programmer a wealth of ideas and methods for interesting programming techniques.

This book gives the programmer a unique insight into the operation of the Commodore 64 plus a wide variety of very useful hints on subjects as diverse as reconfiguring the keyboard and anti tape-copying security. The book also covers the user port and the addition of external circuitry to it.