Thanks (Already found your website :-) Actually, I received software with the unit, and it appears to have an installation already on the hard drive. I first powered the unit with the hard drive disconnected. This got me to the GEM desktop of the integrated Mega-ST. Booting the ATW800 Boot Disk resulted in an expected message that there is no SCSI drive. Connecting the SCSI drive, the unit did not appear to boot on it's own, however booting the ATW800 boot disk results in access to the hard drive, followed by startup message for the Helios server, and ends with the message "Booted..." After that, no more data comes from the Atari monitor connected to the Mega. However entering "trash" on the keyboard and pressing ENTER results in hard drive activity, so I assume the system is actually running, and outputting to the Blossum video display (?) I currently do not have an RGB monitor suitable for connection to the Blossum card - is there any way to direct the Helios console to the Atari Monitor. I have the Helios documents from your site (many thanks), but I have not found information specific to the ATW800, and how to get it up and running ...any pointers you can give me would be most helpful. Regards, Dave BTW: I have already posted IMD images of the disks that I received with it to my site. This includes the ATW800 boot disk, Helios dsiks, Something called "Mira shading", several disks marked "Xdemos", and several more marked "Public Domain". -- dave04a (at) Dave Dunfield dunfield (dot) Firmware development services & tools: www.dunfield.com com Vintage computing equipment collector.