Hi!
> >> They use the protected mode. (memory limited to 4 GB afaik)
> >> The only processor with a 640 K limit is the intel 8086 and 8088.
>
> >> All other processors can additionally to their real operating mode
> >> (protected) emulate the 8086 with its memory limit (real mode)
>
> OB> Which brings up the following questions:
> OB> 1)So what's preventing people from making a DOS that will initially
> OB> run in protected mode? (besides the 286- support.)
>That DOS would not be DOS but OS/2, Linux, NT or any other Protected mode
>OS :)
>
>A Protected mode DOS (can this exist ??) would not be compatible with real
>mode DOS!
A OS is a protected mode OS, if the memory manager switches the OS to
protected mode
So f.e. Dr-DOS can be a protected mode OS, if you let emm386 switch DOS into
V86 mode. So it is also 32-bit and protected and it can support preemptive
multitasking.
so long, florian
www.drdos.org
www.seal.de.vu
