yea one more register like for instance dx where it will be now
add eax, ebx
add edx,eax ; now write a code that writes using ax, then dx b4 returning
add ebx, eax

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?

The
Or Al, 1h ;not 0h

Oh, No The
Or Al,1h ;not 0h Sorry

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...

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...

i got it all, will post it later, now the only thig is interrrupts

i know cs is for the selector but it doesnt select the right selector at all, what memory should i put at GDTR 00007c00h+gdtr or what?

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,

mov ax,07c00h...

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

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

Hey people i got it, its lgdt [ds: (ofset) ] thank u guys and God bless u. Praise be to God

That is the exact notes i have, i jus have a problem with if an operand or a memory ofset folows or es:di or ds:si. Thats all, nothng else i have 3 intel refrence books but none explains. How do i...

Now what about the service giving me a direct pointer to the bank switch code so that i can call it using a far pointer? My book doesnt have that

I am not looking for sgdt, i just want lgdt and the intel manual i am using is unclear. The code was executed in real mode using 3bytes while my operand overide was 66 or should i include 67h too for...

I am trying to load lgdtr. I am initializing protected mode. So it is writen that the opcode's operand will be a word for the ptr limit and double word for ptr of base. Lets say my 48bits are at...

The LGDT is stil causing me problems, what hapens to m16&m32 how many bytes wil folow and how wil the bytes represent the memory ofset?

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...

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...