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echo: os2prog
to: Denis Tonn
from: Eddy Thilleman
date: 1998-12-20 09:48:00
subject: more power

* Original Area: OS2

Hi Denis,

17 Dec 98, Denis Tonn of 1:153/908 wrote to Eddy Thilleman:

DT> Ram is allocated in 4K pages, but "address space" is allocated
DT> in 64K blocks. 

Has the 64KB blocks something to do with the GDT selectors in the processor?

DT> If you want to discuss the differences between ram, address
DT> space, and memory, come on over to the OS2PROG echo. 

OK, please fill me in! :-)

DT> This topic is usually only interesting to programmers.

That I'm.

DT> The most efficient use of address space under OS/2 (up until
DT> now) means allocating 64K (or exact multiples of) blocks.

Is that because the smallest allocation unit the GDT selectors in the
processor can address is 64 KB ?

Cheers   -=Eddy=-  
 Email: eddy.thilleman{at}net.hcc.nl

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