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 Post subject: Re: When your OS goes crazy - Screenshots
PostPosted: Sun Apr 04, 2021 6:01 am 
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Posts: 106
Location: Italy & Ireland
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! :D 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...)
Attachment:
Screenshot_2021-04-04_12-42-35.png
Screenshot_2021-04-04_12-42-35.png [ 15.11 KiB | Viewed 18113 times ]

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Elen síla lúmenn' omentielvo
- DreamOS64 - My latest attempt with osdev: https://github.com/dreamos82/Dreamos64
- Osdev Notes - My notes about osdeving! https://github.com/dreamos82/Osdev-Notes
- My old Os Project: https://github.com/dreamos82/DreamOs


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 Post subject: Re: When your OS goes crazy - Screenshots
PostPosted: Sat May 08, 2021 9:09 pm 
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Joined: Sat May 23, 2020 6:51 pm
Posts: 20
Attachment:
macele.jpg
macele.jpg [ 24.06 KiB | Viewed 17767 times ]

Something went wrong implementing Carriage return.
Code:
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


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 Post subject: Re: When your OS goes crazy - Screenshots
PostPosted: Mon Jul 12, 2021 2:22 am 
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Joined: Fri Jul 09, 2021 12:58 pm
Posts: 6
Nice, patterns...
Image


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asd.png
asd.png [ 66.83 KiB | Viewed 15126 times ]
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 Post subject: Re: When your OS goes crazy - Screenshots
PostPosted: Thu Jul 22, 2021 10:48 pm 
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Joined: Thu Jul 22, 2021 10:32 pm
Posts: 1
Looks like stivale2 doesn't support unicode :mrgreen:
Attachment:
File comment: It supposed to be "©" :mrgreeen:
IMG_20210723_114130.png
IMG_20210723_114130.png [ 12.9 KiB | Viewed 14132 times ]

Attachment:
File comment: Close up
IMG_20210723_114223.png
IMG_20210723_114223.png [ 41.42 KiB | Viewed 14132 times ]

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Working on FaruOS...
---
https://github.com/leapofazzam/faruos


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 Post subject: Re: When your OS goes crazy - Screenshots
PostPosted: Sat Jul 31, 2021 5:20 am 
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Posts: 1
I forgot to increment the offset register twice in the video memory and ended setting the color attribute to a character.


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File comment: meant to say "Boot Error!"
booterror.png
booterror.png [ 1.84 KiB | Viewed 13154 times ]
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 Post subject: Re: When your OS goes crazy - Screenshots
PostPosted: Wed Oct 27, 2021 3:03 am 
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Joined: Wed Oct 27, 2021 3:01 am
Posts: 2
Try create kheap...


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shit.PNG
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https://github.com/Synapse-OS - My OS
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 Post subject: Re: When your OS goes crazy - Screenshots
PostPosted: Sat Jan 08, 2022 11:36 pm 
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Joined: Sat Dec 11, 2021 12:16 pm
Posts: 4
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...

Image


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 Post subject: Re: When your OS goes crazy - Screenshots
PostPosted: Tue Feb 08, 2022 2:39 pm 
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Posts: 55
I guess the bitmap font I generated was too big...
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 Post subject: Re: When your OS goes crazy - Screenshots
PostPosted: Tue Mar 29, 2022 7:32 pm 
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Posts: 196
Adding memory regions to perfectly working physical memory manager. I wonder where such uniformly random data even came from.

Image


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Screenshot_2022-03-30_03-18-53.png
Screenshot_2022-03-30_03-18-53.png [ 58.85 KiB | Viewed 2005 times ]
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 Post subject: Re: When your OS goes crazy - Screenshots
PostPosted: Tue May 24, 2022 2:58 am 
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Joined: Mon Jul 05, 2021 6:57 pm
Posts: 93
Attachment:
os-crazy.png
os-crazy.png [ 24.69 KiB | Viewed 1525 times ]

I forgot to intiialise the attribute buffer apparently #-o

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


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 Post subject: Re: When your OS goes crazy - Screenshots
PostPosted: Fri Jun 10, 2022 12:32 am 
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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)
Image


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 Post subject: Re: When your OS goes crazy - Screenshots
PostPosted: Tue Jul 05, 2022 1:28 pm 
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Joined: Tue Jul 05, 2022 12:37 pm
Posts: 2
Divide Error!


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 Post subject: Re: When your OS goes crazy - Screenshots
PostPosted: Fri Jul 22, 2022 11:55 pm 
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Joined: Sun Jul 17, 2022 4:41 am
Posts: 13
This is a screenshot from my ancient project.


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bluescreen.png
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 Post subject: Re: When your OS goes crazy - Screenshots
PostPosted: Sat Jul 30, 2022 6:39 am 
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Joined: Thu Jul 28, 2022 1:25 pm
Posts: 4
When you mess up your multiboot header


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 Post subject: Re: When your OS goes crazy - Screenshots
PostPosted: Mon Aug 01, 2022 8:42 pm 
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Posts: 212
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 :lol:


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font.jpg
font.jpg [ 106.1 KiB | Viewed 655 times ]
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