For those interested, I have been doing work on SpaceWar 7800 again. I reworked the kernel to use the techniques used in by balldemo. (Namely storing the end of list indicies in ZP RAM and having Y=0 be at the top of the frame.) My current challenge is the player to shot collision detection routine, which will be pixel perfect. Once that is working, I'll update the source & binaries on the website. Unfortunately the videobrewery.com databases were recently destroyed by a hacker and no backups exist (other than web caches and archives). It also may be some time before the site is back up and running normally. I may still do a development diary, but it will probably be simple static pages.