Emulation, how does it work?
vtAlpha, vtVAX and vtSparc products create a virtual equivalent of the original Alpha, VAX or Sparc system inside a modern IT-platform (X86 hardware, virtual machine product or Cloud). Your Sparc, Alpha or VAX software recognizing the virtual system as the hardware it used to run on and continues to operate unchanged.
No software changes ⇒ no problems.

It really is that simple. The process of course, not the technology behind it. By creating the exact equivalent of the Sparc, Alpha or VAX you are replacing, your software is presented with the hardware interfaces it is used working with. Which means your software does not need to change.
