Short: OS friendly wait-for-bottom-of-frame routine Author: bsimpson@mcs.dundee.ac.uk (Bruce M. Simpson) Uploader: bsimpson mcs dundee ac uk (Bruce M Simpson) Type: dev/asm Architecture: m68k-amigaos With some hacking about, this could be used for Viewports. At the moment, it's really intended for people who are taking over the copper and blitter themselves, but are using OS functions for arbitration like Chris Green recommends. Enjoy - Bruce