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Member Avatar for torbecire

the code you wrote is not for such a sequence, try and calculate manually and you'll see, u must write another code. try adding one more register. whats with the numbers anyway?

Member Avatar for ynahneng
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Member Avatar for sgk26p10p07

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

Member Avatar for Rider99
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277
Member Avatar for sgk26p10p07

Now i have been able to create the gdt's and when i change to pmode, will a short JMP flush the instruciton prefetch queue? here is a sample of my code and the gdt and gdtr content, [code] mov ax,07c00h mov ds,ax lgdt [ds:descr] ;switch to pmode by setting bit …

Member Avatar for koyi
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175
Member Avatar for sgk26p10p07

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 …

Member Avatar for sgk26p10p07
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59
Member Avatar for sgk26p10p07

Why does my computer reboot after i set PE bit of cr0 or run lmsw? I have set all the code and data segments

Member Avatar for Duoas
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69
Member Avatar for sgk26p10p07

I Need help on how to write the full opcode of the above x86 codes. i saw like for sgdt it is 0F 01 /1. the problem is i dont know the full opcode will it be 0F01[01-this is what am not sure][then the 48 bits] FASM cannot compile the …

Member Avatar for sgk26p10p07
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Member Avatar for sgk26p10p07

Im coding on vesa mode 116h, i knw its properties like banks windows and resolution, my only problem is that i dont knw how to switch banks and dont know what the windows refer to. I also want help on the vesa service that provides the pointer to bank switch …

Member Avatar for Duoas
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213

The End.