I don't think it has any support for encryption built in per se, AFAIK. As for pointing it at a block device on a UNIX system instead of a file, I think that _might_ work. Never tried it though. Sampsa On 5 Jun 2010, at 02:31, Zane H. Healy wrote: Here is a SIMH question, does it support encrypted disk images, or can it use physical hard drives? Zane On Sat, 5 Jun 2010, Sampsa Laine wrote: You can always run SIMH of course of another box... Sampsa