🚀 go-pugleaf

In <1992Jul30.125957.16619@coli.uni-sb.de> chbl@sbustd.rz.uni-sb.de (Christian Blum) writes:

>There is another point on memory managers: they put the processor in the
>virtual V86 mode. This means: the processor emulates an 8086 with extended
>instruction set. It's really an emulation: interrupts don't work. EMM386
>and QEMM solve this by emulating the interrupts, too, so they really are
>software-called by the manager if HE (the manager, god of your system)
>is triggered by one himself.

>All those emulations slow down your system. Performance can decrease by
>10 percent or so...

>BTW: some programs don't work with the V86 mode. E.g. DKBtrace, Windows
>(except for win /r), ...

This is an ambiguous statement. Current versions of memory managers
work perfectly with Windows 3.0 and 3.1 *although* the managers put
the system into Virtual 8086 Mode. This is because they are designed
to be compatible with each other on a single-tasking DOS system.
DOS emulators like VP/iX for Unix, however, don't support Windows
in Standard or 386 Enhanced mode. 

Regards,
Thomas Liening

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