OpenBSD 5.5 on VirtualBox with AMD A6

(I’ve got Windows 8.1.) Here’s the settings I used:

  • version: OpenBSD 64-bit
  • Enable I/O APIC
  • Extended Features: Enable PAE/NX
  • Processor(s): 1 CPU
  • Hardware Virtualization: Enable VT-x/AMD-v
  • Uncheck Nested Paging
  • install55.iso file
  • BIOS: disable secure boot

Probably a lot of these settings are unnecessary if you pick the right version of OpenBSD to start. I wanted 32-bit to stick to the single-threaded kernel, but whatever.