@MrSnippy If you can fit the iso on the repl yes

@deliciouscupcak its not broken, the repl just doesn't run any OS with it since its just a blank repl that installs qemu in a way to make it work.
now that nix exists you can simply tell nix to install qemu and it will do it correctly without having to upload a bunch of files or anything

@Seven7Four4 i got the same question
@CSharpIsGud could you help

@mrman314 I had put the fix on the other ones with it I just forgot to do it with this one. it should work now

@CSharpIsGud Thanks for the quick reply, It works now, Thanks!

@LucasAllori Fork the repl this post attached, I uploaded all the things it requires from my own computer.

@CSharpIsGud Thanks! Now I don't have to download the OS and run it on my computer

@sugarfi I have an OS with segmentation, keyboard input and vga output, Once I finish up "userland"(I didn't use paging) im going to put it on repl talk.

@CSharpIsGud nice! I started once and got as far as GRUB and paging, then I tried again later and I set up my own 4-stage bootloader that entered protected mode. Then I accidentally deleted all my code.

@sugarfi How did you get paging, by the time I got to that part of the book I was reading I had already done a lot and I couldn't actually identity map anything.

@CSharpIsGud I basically followed a tutorial, with a couple of modifications: https://wiki.osdev.org/Setting_Up_Paging. Once you enable it and set up a table and directory, you just have to use table[vaddr >> 12] = phyaddr to map addresses.

@sugarfi Oh yeah thats essentially what I had, at one point I managed to make it work without faults but the addresses weren't accurately mapped and I couldn't use the framebuffer anymore.

@CSharpIsGud yeah, the mapping goes by pages, not addresses, so it can be inaccurate. I don't know why you couldn't see the framebuffer, though. Did you map the whole lower 1mb?

@sugarfi Pretty sure that part got mapped otherwise it probably would of just exploded

@CSharpIsGud if you try to access unmapped memory, at least in qemu, there is a segfault or triple fault or something and the machine reboots.

@sugarfi My most working solution didn't crash, its just the framebuffer wasn't at the spot I wanted it to be in, just writing a huge chunk of data somewhere would eventually write into the framebuffer at some point

@CSharpIsGud ok

@LiamDonohue Assuming you have one just run qemu like you normally would like qemu-system-x86_64 IMAGE.iso or qemu-system-x86_64 -kernel KERNELIMAGE

kk @CSharpIsGud

@RobertFurr The first line wasn't supposed to be a comment, I fixed that. I need to find some way to keep it from reinstalling qemu every time if its already installed and I was testing it.
the second line is actually a comment, you can put whatever there like commands to compile a kernel

@CSharpIsGud okay. Can you put a comment with an example as to what someone should do so they don't have to figure it out yourself?

@RobertFurr I thought of adding an example OS, but the point of the post is to show qemu working on repl.it not developing an OS.

@CodeSalvageON Why didn't it work what did it say

@CSharpIsGud it said command not found

@CodeSalvageON oh, uncomment install-pkg qemu

@CSharpIsGud k

@CodeSalvageON

@CSharpIsGud thanks! Works great now!