BrokenThorn Entertainment

You're right... for some reason I didn't have the last part of the kernel loading in my bootsector.

Thanks for the help

I have been plagued the last couple weeks by an error that i thought was in the code. However, it appears that my entire kernel is cut off at 0x100200 for some reason and the rest of the memory is filled w/ 0s. I'm very confused by this.

Well that makes sense because my entire kernel is written in assembly.

In Tutorial 15 you listed the default interrupt handler code as this: The only way I could get it to work was for me to remove the add esp, 12 line.

Explanations?

Yeah, 64k could be kinda limiting, I'm just trying to make it as fast and space efficient as possible... maybe I'm just sick of Windows taking five minutes to boot

Here's a thought, the kernel is supposed to be loaded to 0x100000, right?

Why not set ds to 0xFFFF and di to 0x0010 after A20 has been enabled and load the kernel to the right place from 16 bit code?

The OEM Parameter Block, Describes the disk as FAT12.

I see what you're saying now and I moved my 16 bit functions right after the OEM, the only reason I hadn't done that in the first place was cause I didn't want to have to scroll through the functions every time to get a point in my code

Well that seems to work, but I am still very confused. When my bootloader and stage2 were still serparate I was having the exact same problems, but I have not heard anyone else encountering the same issues. Mixing 16 bit and 32 bit code the way you are currently doing can cause possible alignment is...

What do you mean by odd 16 and 32 bit sections?

It is essentialy the bootsector and stage two crammed in the same place.

It seems like 0x012d should be the offset but for some reason cs is not being added in, any reason why it's doing this?

I debugged it till it got to the jmp into protected mode and this is what boch's gave me
what? Shouldn't it be jmp far 0008:7C?? or something like that?

It seems I spoke too early, it still doesn't work. So weird

That makes sense now that I look at it, but I had copied that part from the downloaded example which means that the example is wrong. At this point in time my kernel is still flat. Fortunately because I was able to combine the loading of the FAT and the Root Directory, I will still have enough space...

any suggestions?