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Show HN: My from-scratch OS kernel that runs DOOM

(github.com)
320 points UnmappedStack | 1 comments | 24 Apr 25 00:15 UTC | HN request time: 0s | source

Hi there! I've been on-and-off working on TacOS for a few months, which follows some UNIX-derived concepts (exec/fork, unix-style VFS, etc) and is now able to run a port of Doom, with a fairly small amount of modifications, using my from-scratch libc. The performance is actually decent compared to what I expected. Very interested to hear your thoughts. Thank you!
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gitroom ◴[24 Apr 25 01:02 UTC] No.43778348[source]▶
Dude, getting Doom to run on your own kernel is epic - I gotta try building some wild stuff like this someday
replies(1): >>43778350 #
UnmappedStack ◴[24 Apr 25 01:03 UTC] No.43778350[source]▶
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)
replies(1): >>43778590 #
edoceo ◴[24 Apr 25 01:56 UTC] No.43778590[source]▶
Could you explain more about why you'd need to port things? If you have a libc, shouldn't it "just work"? Do you have to scatter #define or #ifdef all over? What about if you wanted to support Golang? Would you have to implement a bunch of syscall?
replies(1): >>43778671 #
1. UnmappedStack ◴[24 Apr 25 02:13 UTC] No.43778671{3}[source]▶
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't really need many #ifdefs, at least not for most things, as it's a more or less posix-based libc.