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 Post subject: Re: What does your OS look like? (Screen Shots..)
PostPosted: Mon Aug 21, 2017 7:56 am 
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Finally, finally I have a stable but still-needs-to-be-improved multitasking implementation.
(After asking ridiculous amount of questions)

Image

The seven tasks are loaded from seven ELF binaries that prints A, r, d, u, i, n, o 255 times respectively that compiled with my i686-agola os specific toolchain.

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 Post subject: Re: What does your OS look like? (Screen Shots..)
PostPosted: Mon Aug 21, 2017 9:58 am 
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Agola wrote:
Finally, finally I have a stable but still-needs-to-be-improved multitasking implementation.
(After asking ridiculous amount of questions)

Image

The seven tasks are loaded from seven ELF binaries that prints A, r, d, u, i, n, o 255 times respectively that compiled with my i686-agola os specific toolchain.


Nice to see that beast finally working. After all those questions. :P
Does it support any kind of synchronization or message passing or resource sharing?

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 Post subject: Re: What does your OS look like? (Screen Shots..)
PostPosted: Mon Aug 21, 2017 2:50 pm 
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Octacone wrote:
Agola wrote:
Finally, finally I have a stable but still-needs-to-be-improved multitasking implementation.
(After asking ridiculous amount of questions)

Image

The seven tasks are loaded from seven ELF binaries that prints A, r, d, u, i, n, o 255 times respectively that compiled with my i686-agola os specific toolchain.


Nice to see that beast finally working. After all those questions. :P
Does it support any kind of synchronization or message passing or resource sharing?


Yes, I've a very basic mutex implementation. I've implemented async message passing also but it is not *very* stable and it is very very ugly. I'm working on signals now, but it is kind of hard though.

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 Post subject: Re: What does your OS look like? (Screen Shots..)
PostPosted: Mon Aug 21, 2017 4:52 pm 
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I've totally rewritten my kernel with a far more portable / stable codebase. I've not yet escaped kernel-mode, but I do at least have fake "processes" and "threads" that, aside from being in kernel-mode, operate like the real thing.

Here I am cat-ing a file sitting in my initrd and requesting the system time.

Attachment:
Screenshot-20170821234804-720x400.png
Screenshot-20170821234804-720x400.png [ 6.07 KiB | Viewed 3497 times ]


Much to do!

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 Post subject: Re: What does your OS look like? (Screen Shots..)
PostPosted: Mon Aug 21, 2017 10:18 pm 
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here is the same chat proof of concept, this time via TCP. Sadly I was lazy in excitement to rename the executable. Only modified SOCK_DGRAM to SOCK_STREAM, so yeah.

http://imgur.com/b5sPyhP

:-)

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 Post subject: Re: What does your OS look like? (Screen Shots..)
PostPosted: Tue Aug 22, 2017 4:20 pm 
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Nothing fancy, just a kernel shell. Need to work on memory before moving on, though.
This is my 4th or 5th try at OS, and furthest I've been, I am pretty big noob at this, so I am very much excited.

Image

Image

Previous versions:
Image

Image

I also did few videos of older versions:
https://youtu.be/RVVtUBxCCfI
https://youtu.be/5hzzT5TGtNA

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 Post subject: Re: What does your OS look like? (Screen Shots..)
PostPosted: Sun Aug 27, 2017 4:57 pm 
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Chilling in IRC with fun people smiling...

http://i.imgur.com/xo3W0Cv.png

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 Post subject: Re: What does your OS look like? (Screen Shots..)
PostPosted: Thu Aug 31, 2017 11:09 am 
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Why have i suddenly started working on a network stack after a few years of inactivity?

To do this: https://www.instagram.com/p/BYdy8Xmlq9r/

Once upon a time i found this old motherboard on a "old used crap" sale.
It was some sort of a self-contained thin client - some weird Via x86 CPU, Via Rhine network card, 32 Mb of RAM.
And a Disk-on-Chip by M-systems.

That DoC is only 32Mb, and is one of the earliest SSDs.
I long wondered what was on it, and recently decided to figure out what would it take to find out.

The chip was fairly well documented, so writing a driver for it was straightforward.
Getting the data out was a good excuse to finally make a network stack.

The network card is supported by Linux, so i cheated by peeking at it while i wrote a driver for Aprom.
The network stack itself took some time.
After i got a ping working, some time was wasted hunting old architectural bugs and rewriting a bunch of architectural stuff elsewhere.
And finally, after a few false starts i managed to dump the content of the DoC and send it over UDP via a real network card with real driver to another PC.

Sure, i could have just dug up an old Linux distro, slap a DoC patch on it, dump from there, and be done in an hour rather than a few weeks, but what's the fun in that?

And this is how i used my Aprom OS for a real purpose for the first time. :)


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 Post subject: Re: What does your OS look like? (Screen Shots..)
PostPosted: Thu Aug 31, 2017 5:34 pm 
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I'm porting Agola to 64-bit, after two hours of work, I've finally entered long mode. I will be able to load my kernel fully after building a 64-bit IDT and rewriting the paging code for 64-bit. Seperating arch specific things and common things in Makefile design before helped me a lot.

Image

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 Post subject: Re: What does your OS look like? (Screen Shots..)
PostPosted: Fri Sep 01, 2017 2:44 am 
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Agola wrote:
I'm porting Agola to 64-bit, after two hours of work, I've finally entered long mode. I will be able to load my kernel fully after building a 64-bit IDT and rewriting the paging code for 64-bit. Seperating arch specific things and common things in Makefile design before helped me a lot.

Image


Make sure you get get higher-half mapping working asap. It'll save you a lot of bother further down the road ;)

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 Post subject: Re: What does your OS look like? (Screen Shots..)
PostPosted: Fri Sep 01, 2017 8:21 am 
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Here is something that took ages to synchronize and in the end had to be rewritten.
It was definitely worth an entire morning of work.


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 Post subject: Re: What does your OS look like? (Screen Shots..)
PostPosted: Fri Sep 01, 2017 7:12 pm 
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Gramado - Shell App


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 Post subject: Re: What does your OS look like? (Screen Shots..)
PostPosted: Fri Sep 01, 2017 7:14 pm 
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Location: Londrina - Paraná | Brazil
Gramado: Message box.


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 Post subject: Re: What does your OS look like? (Screen Shots..)
PostPosted: Fri Sep 01, 2017 7:17 pm 
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Gramado: Help message on Boot Manager.


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 Post subject: Re: What does your OS look like? (Screen Shots..)
PostPosted: Fri Sep 01, 2017 7:20 pm 
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Gramado: cpuid


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