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protected mode programming guide
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Anyone to help with protected mode programming,like help me create a a data descriptor pointing to 0b800h when i try to write to RAM it rebbots
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Join Date: Aug 2005
Posts: 15,142
Reputation: 
Solved Threads: 1434
Protected mode does not have access to real mode addresses. You have to switch back to real mode to access it. Yes its a pain in the butt. How to do it? I don't know, all I know is what I've read from documentation of dos extenders such as Phar Lap. Unfortunately when MS-DOS died so did many other companies such as Phar Lap.
Last edited by Ancient Dragon; Nov 11th, 2007 at 8:41 am.
Don't PM me with questions -- you might get a nasty PM in response. If you have a question then post it in one of the forums.
heya why is it that wen i switch back to real mode i cant access real mode interrupts even when i never modified anythang like for instance this code
mov EAX,CR0
OR AL,0H
MOV CR0,EAX;THEN SWITCH BACK TO REAL MODE
MOV EAX,CR0
AND AL,10B
MOV CR0,EAX
;THEN INT 10H
MOV AX,3H
INT 10H
;THEN MY PROGRAM DOESNT RESPOND PLS HEL-P
mov EAX,CR0
OR AL,0H
MOV CR0,EAX;THEN SWITCH BACK TO REAL MODE
MOV EAX,CR0
AND AL,10B
MOV CR0,EAX
;THEN INT 10H
MOV AX,3H
INT 10H
;THEN MY PROGRAM DOESNT RESPOND PLS HEL-P
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