Reply 60 of 76, by Jo22
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CraigAB69 wrote on 2023-01-01, 10:39:Yea, I don't know mate. […]
Jo22 wrote on 2023-01-01, 10:25:I'm using an MS-DOS 6.22 VM with QEMM 9 in Virtual Box 4.1.12..
I've created it a few years ago when I was testing DESQView/X, I believe.Yea, I don't know mate.
I have been using that Dos 6.2, Win 3.11 for about 12 months now and it ran as expected. Install Qemm and strange crashes started.
Qemm has been removed, and stability has returned.
I don't really have time to dig into it at the moment and RTFM.
The TECNOTE directory didn't even help, nor the 2 books on Internet Archieve.
Which is is why I was looking for a KB.
I even tried to look for quaterdeck.com on WayBackMachine, be even those snapshot redirected to porn sites.
I feel your disappointment.
Yeah, I guess QEMM is less stable than MemMaker/EMM386.
But I assume that's because QEMM was made with 90s hardware in mind - 386, 486 and early Pentium.
All that dark magic that QEMM did use was very low-level and specific to the technology of the day.
AT BIOS, motherboards and CPUs have drastically changed since.
The meaning of certain undocumented CPU instructions have changed, the instruction timings have changed.
The cache design has changed, the CPUs became superscalar etc.
CPUs got so fast that the timing-loops in certain applications do fail now (VBox VMs can be throttled).
So that might be part of the problem. 🤷♂️
Also, the Stealth option seems to be most tricky.
It *works* on my real Pentium 133, but sometimes things just hang.
"Time, it seems, doesn't flow. For some it's fast, for some it's slow.
In what to one race is no time at all, another race can rise and fall..." - The Minstrel
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