When your OS goes crazy - Screenshots

[finarfin]

12 years after I created this post, i'm going to post a new screenshot of my new os going crazy!!
(i started recently a new kernel)
This is related to the issue i posted here: viewtopic.php?f=1&t=42446

But the result when not using the framebuffer is fascinating! And some how very tidy and clean...
This happens after adding a new print statement (after many of them already added above... and working, but for some reason whatever is the content is causing a that **** to happens...)

[JohnpaulTH]

Something went wrong implementing Carriage return.

Code: Select all

push rax
push rcx
push rdx
        mov rax, rdi
        sub rax, TEXTBUF_BASE
        mov rcx, 80
        div rcx
        sub rdi, rdx
pop rdx
pop rcx
pop rax

EDIT: adding 'xor rdx,rdx' after the pushes solved the problem.
I will have to look at my previous implementation

[valdect]

Nice, patterns...

[leap123]

Looks like stivale2 doesn't support unicode

It supposed to be "©" :mrgreeen:

Close up

[trashoperatingsys]

I forgot to increment the offset register twice in the video memory and ended setting the color attribute to a character.

[0Nera]

Try create kheap...

[giawa]

My original string implementation used a null terminated array of bytes, but now I have switched to using 16 bit characters as I add better support for real C# strings. I guess I didn't properly convert all my VGA text mode string functions properly...

[iProgramInCpp]

I guess the bitmap font I generated was too big...

[pvc]

Adding memory regions to perfectly working physical memory manager. I wonder where such uniformly random data even came from.

[davmac314]

I forgot to intiialise the attribute buffer apparently

Edit: problem was actually a wrong calculation for character (and attribute) position in the scroll routine.

[Techflash]

This is an older build of my OS. I was trying to get command-line arguments from GRUB using Multiboot working. I was allocating an array of array of char in order to hold an array of argument strings. I went through the trouble to zero out the array, but I used the wrong number (by a lot) in the for loop, and it ended up running off the end of the stack and zeroing god knows what by like 64k, and it caused this. (EDIT: Oh, and after about 30 seconds it caused a triple fault)

[RayanMargham]

Divide Error!

[one737]

This is a screenshot from my ancient project.

[oli2]

When you mess up your multiboot header

[xeyes]

When my monitor tried to help the BIOS copying fonts, but didn't take care of many of the subtleties surrounding REP MOVSB.

The result seems to belong to the nice collection of "broken but not totally random VGA patterns" here. You might even be able to spot the cursor, which was still blinking