Game Programming for the Propeller Powered Hydra - rosco-pc/propeller-wiki GitHub Wiki
by André LaMothe
ISBN 1-928982-40-9
An 812 page book which comes included in the box with the Hydra Console. It is also for sale separately. It has an accompanying CD with a few games, lots of starters for games, other demos and some Graphics Drivers. The software on the CD is for use by the owner. It is not open source. Drivers from the CD must not be distributed with games.
You can download the manual, useful for understanding the Parallax reference graphics drivers.
Errata:
p. 648 Some clones of Defender were tile-based as stated. However the original William's Defender used a bitmapped frame buffer.