Game cartridge compatibility... spectacular sound... arcade style graphics... and high caliber computing capabilities make the Commodore 64 the most advanced personal computer in its class for home, business and educational use.The COMMODORE 64 PROGRAMMER'S REFERENCE GUIDE tells you everything you need to know about your Commodore 64. The perfect companion to your Commodore 64 User's Guide, this manual presents detailed information on everything from graphics and sound to advanced machine language techniques. This book is a must for everyone from the beginner to the advanced programmer.For the beginner, the most complicated topics are explained with many sample programs and an easy-to-read writing style. For the advanced programmer, this book has been subjected to heavy pre-testing with your needs in mind. And it's designed so that you can easily get the most out of your Commodore 64's extensive capabilities.