OSDev.org

My 64 Bit OS can only detect ~3-3.5 GiB ram
If I use VBox it sees 3.5G if I use Qemu it only sees 3G
My bootloader uses the INT 0x15, EAX = 0xE820 method to detect ram

I have no other information, and am lost im this mess.

Are you collecting the entire memory map?

Are you reading all 64 bits of the addresses?

I belive so, I send peramitors to the bios and send a pointer to the result to the kernel

Have you tried looking at the memory map? Like, by printing it or something?

Yes, not priting the full thing but i did a print out of lengths and it shows exactly why my OS detects

I am trying to work throught my boot code and do some checks there but I still have not found a solution

How much RAM did you configure in those VMs?

i have tride at 4G but am curently trying with 8G
I have tride between 32M and 24G in Vbox yet it only works up to 3.5G

Can you print the whole memory map and share it?

Also VBox will freeze during initiation of page tables when its using more than 3GiB
And I just noticed it crashes if I use exactly 2G

This is only in VBox

Octocontrabass wrote:Can you print the whole memory map and share it?

I can try but I will need to try to fix my crash problem too, as it messes with output

VBox halts apon: when I am using more than 1G ram

Does VBox not suport 1GiB pages???

well iv figured out vbox, but not why i cant see more memory hm

Xeno wrote:Does VBox not suport 1GiB pages???

It's an optional feature, you need to check CPUID before you try to use it.

Octocontrabass wrote:

Xeno wrote:Does VBox not suport 1GiB pages???

It's an optional feature, you need to check CPUID before you try to use it.

I realized
my code is bad -_-
Im still not able to fuigure out the first problem