chip since Ras (Cas?) is required by ALL dynamic RAM.
====== Technical data sheets and schematics for the ANTIC, GTIA, and POKEY chips are available on Curt Vendel’s web site, thanks to permission from Hasbro’s Atari Interactive Division’s release of this data. See the TIFF scans: http://www.atari-history.com/articles.html Keith Howell has converted the hi-res TIFFs into clean HTML: http://www.howell1964.freeserve.co.uk/Atari/800XL/Atari_800XL.