ANATOMY OF THE DRAGON...by Mike James..(Sigma).6.95.
1983
Dragon Data Approved.

This book is for anyone wanting to know how their Dragon works and how to control it from BASIC. It describes the Dragon's hardware and software from the point of view of a BASIC programmer. It introduces a number of new graphics modes, and explains how GET and PUT can be used to create user- defined graphics, shows how to disable the BREAK key and a great deal more.