OSDev.org

Posted: **Sun May 18, 2003 8:56 am**

i write a boot loader and i open a20 line ,then use
mov esi,100000h
mov al,byte [esi]
,then the cpu run here,it die.

Posted: **Sun May 18, 2003 9:16 am**

You either need to switch to protected mode, or enable unreal mode.

how i cant access above 1M memory