UnmappedStack

8 ms·

31.
by UnmappedStack 1y ago
Umm that's probably the extreme end of OSDev which I likely wouldn't be able to do, at least not for a driver you can buy. Qemu's emulated GPU is documented decently and could be possible, but things like nvidia GPUs are badl
32.
by UnmappedStack 1y ago
https://www.popularmechanics.com/science/a33957256/this-prog...
33.
by UnmappedStack 1y ago
Yes, quite happy with real hardware. The kernel isn't exactly straight to Doom, it boots into a shell which you can just run Doom from, but yeah lol.
34.
by UnmappedStack 1y ago
Given that pregnancy tests can now run Doom, I have to agree with you. It was more of a symbolic thing than a technical difficulty at this point lol.
35.
by UnmappedStack 1y ago
Well, it can do a little more than run Doom, that's just the latest milestone as to what was ported last. It wasn't a huge effort, maybe took a week or so to get Doom itself running including adding libc requirements for Doom, bu
36.
by UnmappedStack 1y ago
I use paging for virtual memory, which gives each process it's own address space. I have a round-robin scheduler connected to the PIT driver, so every 10ms the PIT fires an interrupt which triggers the scheduler, which selects the next
37.
by UnmappedStack 1y ago
Very nice!i
38.
by UnmappedStack 1y ago
Haha not quite at the point Hurd has gotten. I'd be very happy if I could last that long on one project though, I have a tendency to get bored after a few months sadly.
39.
by UnmappedStack 1y ago
I could probably do that. The init program, which is a userspace program called by the kernel which spawns everything else, currently enters the shell but it'd be quite simple to make it just boot into Doom immediately. It's still
40.
by UnmappedStack 1y ago
Well, the LibC is still quite small, and the syscalls aren't really compatible with Linux. A lot of things to port, for example Vim, require system libraries such as ncurses which need syscalls that aren't in the LibC. I don'
41.
by UnmappedStack 1y ago
Not disappointed at all to answer! Running it on my laptop was literally just formatting a USB with the ISO and booting from the USB. I would recommend checking out https://osdev.wiki to start out if you want to write a kernel,
42.
by UnmappedStack 1y ago
Yeah definitely an achievement I'm happy with. I've got a bit of refactoring to do, ANSI parsing etc then I'd like to port more - perhaps even Vim (or another portable Vim-like editor called Dim)
43.
Show HN: My from-scratch OS kernel that runs DOOM(github.com)
320 points by UnmappedStack 1y ago|81 comments