At 2:26 PM +0000 1/5/10, Mark Wickens wrote: On Tue, 2010-01-05 at 06:24 -0800, Bob Armstrong wrote: Isn't Personal Alpha a version of the Charon-AXP emulator? I've never used Personal Alpha, but I am using the free version of Charon-AXP and I can tell you that, unlike simh, it has no OpenVMS idle detection. Charon will always use 100% of whatever CPU(s) it's running on, regardless of what the emulated system is doing. That makes it difficult to run Charon concurrently with other simulators unless you can afford to dedicate separate CPUs to each one. Bob -- ... and significantly bumps up your electricity bill to boot. How does it perform on something like an Atom processor? I've been thinking about building a system with an Atom 330 CPU for SIMH, KLH10 and E11. Zane -- | Zane H. Healy | UNIX Systems Administrator | | healyzh at aracnet.com (primary) | OpenVMS Enthusiast | | MONK::HEALYZH (DECnet) | Classic Computer Collector | +----------------------------------+----------------------------+ | Empire of the Petal Throne and Traveller Role Playing, | | PDP-10 Emulation and Zane's Computer Museum. | | http://www.aracnet.com/~healyzh/ |