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

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320 points UnmappedStack | 1 comments | 24 Apr 25 00:15 UTC | HN request time: 0.207s | 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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thewileyone ◴[24 Apr 25 01:56 UTC] No.43778587[source]▶
Dude, I'm impressed cause I don't the energy to build my own OS kernel!

But here's a wacky idea. Just set it up so that the OS only runs DOOM as default. Boots directly into Qemu and runs DOOM, nothing to select or change. Maybe something you could fold other games into so that they can run off a USB boot loader. Might be appealing to people who don't want to install or compromise their base setup.

replies(1): >>43778679 #
1. UnmappedStack ◴[24 Apr 25 02:14 UTC] No.43778679[source]▶
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 not quite stable enough for actual usage, but it is able to boot off a USB at the moment, yes.