The files called HOBBY92A.DCM and HOBBY92B.DCM are diskimages of side one and two of the Atari-8bit Hobbytronic '92 demo disk. After you've seen enough, try to load the file DEMO8PL.COM which you can find on side 2 of the disk. It's a demo from the former CSFR showing the use of 8 players (as it claimes) and some neat music too.