Hi
"Or Botton" <[EMAIL PROTECTED]> wrote:
>> 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!
OB> 2)And what about the programs that use "protected mode extenders"?
These were born because of DOS incapabilities !
They switch to PM (were there is NOTHING left from DOS) and if they need a
DOS service the extender switches back to real mode, calls the service and
switches back to PM.
This is slow (win95 calls it thunking)
OB> Or Botton
OB> [EMAIL PROTECTED]
CU, Ricsi
--
Richard Menedetter <[EMAIL PROTECTED]> [ICQ: 7659421] {RSA-PGP Key avail.}
-=> It is much easier to be critical than to be correct <=-
