ka@hou3c.UUCP (Kenneth Almquist) (12/26/83)
The ZORK II program is supposed to allow you to make exactly one backup copy in case the original gets damaged, but the code to generate the backup didn't work when I tried it. When I try to copy the disk using diskcopy I get read errors. Has anybody written a program to back up copy protected disks? If not, has anybody figured out how this protection scheme works? The floppy disck controller on the PC supports "read deleted data" and "write de- leted data" commands; does anybody know what these do? Kenneth Almquist
jim@randvax.ARPA (Jim Gillogly) (12/30/83)
--------- Zork II backup disks can be made using System Backup from Norell Data Systems, 3400 Wilshire Boulevard, P.O. Box 70127, L.A., CA 90010. It supposedly copies more protected programs than Copy II PC (which I think will also make your Zork backup, but no guarantees). I also used System Backup to make a copy of Flight Simulator (yes, I'm a legal owner) to try the CompuServe IBM PC Sig's modification to make it use color in the RGB mode. (Flight Sim is usually B&W using RGB.) Oh, yes, it costs $50 (and I don't get a cent of it). Jim Gillogly I/ / randvax!jim I_/ jim@rand-unix I