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A brief description on how the Shifter chip on Atari 16/32 works, so nobody will have to guess how to set it up for hardware scrolling

Following article explains how to access ATI Radeon hardware accelerated functions via XBIOS calls and create double buffered screen output as in little demonstration I have posted some time ago. It also exposes problems with current versions of drivers. To run this code Atari Falcon030 is required with CT6x accelerator and CTPCI bridge with ATI Radeon card.