Tweak to maximize # of demos that will run from harddisk. ======================================================== 1. Make sure you have fastmem/slowmem in your Amiga 2. Unplug or disable external floppy drives 3a. Workbench 1.3.3: Replace your S:startup-sequence with this one. 3b. Other kickstarts: Paste the first 4 lines of this one into your S:startup-sequence, add a line ENDIF at the very end of the file. 4. Copy the other files to C: 5. Reboot and hold left mousebutton. 6. Navigate folders with cd and dir. Type prompt %s> and press enter to know where you are. :) This maximizes the amount of free chipmem available for A500 demos, which often expected to be run from packdisks where commands like these were in the startup-sequence on the floppy. (ChipMap is a monitoring program to spot low chipmem problems. If the last line of its output starts with "$1e000" or lower, "all" demos should work. Even up to $2c000 should be fine in most cases.) (The command line lha e myfilename.lha myfoldername extracts an archive to a folder. Just pulled it from my C/ folder, so just go to http://aminet.net/package/util/arc/lha if you have trouble making it work.) Running really old demos that don't like FastMem: ================================================ These were made before there were any A1000/A500 fastmem or slowmem expansions, or before the coders or assembler developers knew they were coming... Typical bugs include rolling pictures and corrupted music. If you can see graphics on the screen, it's probably some other error. Before running such a demo, run HogFast to allocate all non-chipmem so it can't put chipmem stuff like music there. SCX-Boot 3.1 is a utility+antivirus bootblock that allows you to toggle fastmem (and drives) on/off. It's a useful bootblock for making packdisks, but do use HogFast for individual demos if you can, then the user has to do nothing. Demo And Live! /Photon