Hello E-UAE List, My 2001 vintage Amithlon, which broke this summer, was mostly used for system-friendly apps. I don't play games much or run demos. I built a new low-to-mid-range computer (Athlon X2 5000+ CPU, MSI PCI-E nVidia graphics card, etc) and installed Ubuntu (presently 8.10). Following the https://help.ubuntu.com/community/EUAEAmigaEmulator help page, I built and installed e-uae-0.8.29-WIP4. My install uses X, not SDL, and has no JIT support (arch != i386). My Amiga install is pretty provisional so far, Linux directories containing OS3.9 and Amiga Forever files and a massive hardfile image of my Amithlon partitions. Over all, it performs pretty well (roughly as fast as my fastest real Amiga was), and seems pretty stable. I would like to get a little more speed out of it (redrawing CAD screens, updating spreadsheets, displaying icons in a newly opened drawer, etc.). I have been searching, reading mailing lists and fora, but I'm not too clear on amd64 options and prospects. I gather that, to use the JIT, I must install an i386 version of E-UAE (compiled with JIT), and make sure that the required Linux libraries are present in i386 versions as well. What do I do ---copy uae over and see what blows up when I run it? Also, in the August 15 versions, there is a 586 version. What's that? Is it specific to pentiums (Intel only?)? Are there any fine points or tricks to running E-UAE on amd64 and getting the best performance? Thanks, Walter