[[Image:Ams ins out frontpage.jpg|right|thumb|250px|Frontpage]]
A [[firmware]] manual and a guide to the workings of the various chips in the CPC at I/O level. The compact size of this book made it, for many programmers, a more practical reference than the bulky [[Soft SOFT 968]] official firmware guide. Useful reference pages on the [[CRTC]] and other chips completed the work.