Re: kernel 2.2.6
> On 1999-04-27 18:53, Peter Allen wrote:
>
> > It is because on i386 machines the processor boots in real
> > mode, which is limited to the (in)famous 640Kb.
>
> (I am quite sure that) the 640 k limit is DOS, while the CPU's
> real-mode limit is 1 MB.
The processor do indeed have 1MB to play with, but only 640k of
that is RAM. The rest of that address space is reserved for
memory mapped devices such as the cga/vga compatible screen.
The 640k limit applies to all real-mode software, not
msdos only.
Helge Hafting
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