VAX and Alpha Emulation, how does it work?
vtAlpha and vtVAX create a virtual equivalent of the original Alpha or VAX system inside a modern general purpose computer (Intel or AMD based X86 architecture). Your Alpha or VAX software recognizing the system it used to run in 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 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.