how i cant access above 1M memory

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bgcq

how i cant access above 1M memory

Post by bgcq »

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.
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Tim

Re:how i cant access above 1M memory

Post by Tim »

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