When your OS goes crazy - Screenshots

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Octacone
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Re: When your OS goes crazy - Screenshots

Post by Octacone »

This is what happens when I want to do anything GUI related.
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AwfulBug.png
OS: Basic OS
About: 32 Bit Monolithic Kernel Written in C++ and Assembly, Custom FAT 32 Bootloader
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NunoLava1998
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Re: When your OS goes crazy - Screenshots

Post by NunoLava1998 »

octacone wrote:This is what happens when I want to do anything GUI related.
Read a bit more of your books and the wiki and you should be able to get it working.
Developing TRIODIUM OS. Or call it Dixium if you want. It doesn't matter.

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Octacone
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Re: When your OS goes crazy - Screenshots

Post by Octacone »

NunoLava1998 wrote:
octacone wrote:This is what happens when I want to do anything GUI related.
Read a bit more of your books and the wiki and you should be able to get it working.
alexfru wrote: Perhaps, you should follow your own advice?:
NunoLava1998 wrote: Read a bit more of your books and the wiki and you should be able to get it working.
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Re: When your OS goes crazy - Screenshots

Post by zesterer »

I think it's fair to say I have issues with kernel multi-tasking. Specifically, garbage code execution. Hmmm.
Screenshot_2017-01-16_19-31-14.png
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SpyderTL
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Re: When your OS goes crazy - Screenshots

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zesterer wrote:I think it's fair to say I have issues with kernel multi-tasking. Specifically, garbage code execution. Hmmm.
Screenshot_2017-01-16_19-31-14.png
Ahh, my old nemesis.... Three lines and an "S".

You probably already know this, but just in case you don't, that's what you get when you dump a null pointer to the screen as ASCII. So I'm going to guess that you're passing a null to your PrintString function...
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Re: When your OS goes crazy - Screenshots

Post by zesterer »

SpyderTL wrote:
zesterer wrote:I think it's fair to say I have issues with kernel multi-tasking. Specifically, garbage code execution. Hmmm.
Screenshot_2017-01-16_19-31-14.png
Ahh, my old nemesis.... Three lines and an "S".

You probably already know this, but just in case you don't, that's what you get when you dump a null pointer to the screen as ASCII. So I'm going to guess that you're passing a null to your PrintString function...
Oh really? Interesting. I have no idea what causes it. After that screenshot, the kernel crashes with an invalid instruction.
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Re: When your OS goes crazy - Screenshots

Post by osdever »

octacone wrote:This is what happens when I want to do anything GUI related.
This is why I wrote about Surface. You can easily make a GUI with it :)
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Re: When your OS goes crazy - Screenshots

Post by MajickTek »

I want to see this "Surface"! Sounds interesting.
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Re: When your OS goes crazy - Screenshots

Post by MajickTek »

Nevermind! I found it on gitlab.
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Agola
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Re: When your OS goes crazy - Screenshots

Post by Agola »

Multitasking screwed something up :shock:

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Re: When your OS goes crazy - Screenshots

Post by onlyonemac »

zesterer wrote:I think it's fair to say I have issues with kernel multi-tasking. Specifically, garbage code execution. Hmmm.
Garbage code execution? Is that a thing?
When you start writing an OS you do the minimum possible to get the x86 processor in a usable state, then you try to get as far away from it as possible.

Syntax checkup:
Wrong: OS's, IRQ's, zero'ing
Right: OSes, IRQs, zeroing
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Re: When your OS goes crazy - Screenshots

Post by MDenham »

onlyonemac wrote:
zesterer wrote:I think it's fair to say I have issues with kernel multi-tasking. Specifically, garbage code execution. Hmmm.
Garbage code execution? Is that a thing?
Yep, otherwise colloquially known as "jumping to hyperspace" at times. It's less likely to happen if you're writing a 64-bit or 32-bit-plus-PAE OS (the NX bit covers most situations, as pretty much nobody here is producing something that has enough of a user base to make it worthwhile for attacks to require an ASLR implementation as well), but that's not going to prevent you from accidentally jumping to existing code at an inopportune time. :)
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Re: When your OS goes crazy - Screenshots

Post by zesterer »

Screenshot_2017-02-01_00-55-17.png
Screenshot_2017-02-01_00-55-17.png (10.48 KiB) Viewed 5314 times
Giving VBE graphics a go. I'm writing a PSF font to the screen, but something's up with my alpha blending :D
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Re: When your OS goes crazy - Screenshots

Post by dozniak »

zesterer wrote: I'm writing a PSF font to the screen, but something's up with my alpha blending :D
Looks very Hotline Miami-sh!
Learn to read.
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Re: When your OS goes crazy - Screenshots

Post by robbiedobbie »

Image

I was working on getting my VGA logging to scroll faster (By finally using a backbuffer...).

I guess I have my offsets wrong somewhere...

PS: This is actually the weirdest of rendering artifacts I have yet encountered on my os. Never had those flashy full screen corruptions...
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