Ideas for running a VB4 application on modern hardware?

Chuck Guzis cclist at
Tue May 3 09:55:07 CDT 2016

On 05/03/2016 05:57 AM, Liam Proven wrote:
> On 3 May 2016 at 05:24, Chuck Guzis <cclist at> wrote:
>> The hardware's not there to run 16-bit code natively in 64 bit 
>> mode.
> I think you mean software?
> It is possible to run Windows 7's XP Mode under Windows 8.x -- I've
> done it.

I'll retrench and restate that in terms of "it depends". If your CPU
doesn't support Hardware Virtualization Mode, you're out of luck:

You'll note that I did suggest VirtualBox with my initial post.  I've
run a variety of "antique" systems under it (under Linux), including
Microsoft Unix (the SysVR4 variant).  That it works has saved me a lot
of trouble over the years.

I don't know how long we'll have any sort of native capability to run
16-bit code without emulation, however.

Of course, anything can be run (more slowly) under emulation or
on-the-fly conversion.

You'll perhaps recall when, a couple of years ago, the Debian kernel
release disabled 16-bit segment descriptors, citing it as a security
issue, causing a minor kerfuffle.  Linus quickly admitted that it was a
mistake--so score one for the oldsters.


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