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Supported O/S

Migration Specialties has deployed SimH VAX running the following O/S. Other O/S may also be supported.

    • ULTRIX 4.5
    • OpenVMS 5.3 - 5.5
    • OpenVMS 6.n
    • OpenVMS 7.n

Host O/S

Migration Specialties has deployed SimH VAX under the following host O/S. SimH VAX will run under 32-bit and 64‑bit versions of these O/S.

    • Windows Server 2016
    • Windows Server 2012
    • Windows Server 2008
    • Windows 10
    • Windows 8
    • Windows 7

SimH VAX™ - A Free Virtual VAX

If you are willing to do some work, SimH VAX is a proven, free, open source virtual VAX solution capable of replacing many legacy VAX and ULTRIX systems. The primary limitations of SimH VAX are its single threaded implementation and lack of a JIT engine. Both items impact potential performance. However, on a modern 3GHz host system, SimH VAX is fast enough to replace most small and midrange VAX platforms without a performance penalty.

Note: If your VAX system contains specialized hardware or is a realtime system, SimH VAX may not be a viable solution.

Learn more about SimH VAX and other SimH derived hardware emulators at The Computer History Simulation Project. If you need assistance virtualizing a VAX system, visit the Migration Specialties Virtual VAX page.

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