Unimplemented: PAE

[Darker]

This is a message I get when booting Debian 8. I know that's a new system but I thought it would be really cool to run actual modern working OS in the emulator. What would be needed to fix that error? I'm a javascript programmer and I'd really like to help!

[warpcoil]

PAE is the Physical Address Extensions of the Paging System on x86 platforms. You can find out more here:

http://wiki.osdev.org/PAE

It shouldn't be too difficult to extend the existing paging mechanism in v86 . . . I wouldn't be surprised if that was the only issue when booting Debian 8 though.

[Darker]

Well, I don't know anything about operating systems and low level operation. I guess I could follow some documentation and verbatim implement what the documentation says.

[copy]

PAE is described in this manual.

Normal 32-bit paging is implemented here. PAE paging follows the same structure, but there is an extra indirection, the tables have different sizes and each entry is 64 bit.

Note that PAE is actually quite useless since JavaScript can't address that much memory anyway. Actually, it's bad for performance (you can see that PAE translation is more complex that normal 32-bit translation). It would be a better idea to install Debian with a non-pae kernel. I'll give it a try.

I wouldn't be surprised if that was the only issue when booting Debian 8 though.

The only thing that comes to mind is MMX/SSE.

[copy]

Debian 8.4 boots perfectly fine after installing linux-image-586. Maybe I'll release this on the front page.

I'll leave this issue open for PAE anyway.

[warpcoil]

Yeah, I done some experiments too . . . Gentoo latest works as well

[ayunami2000]

bump. even if it seems useless, many OSes (namely newer versions of windows) require this and refuse to boot without it.

[iAmInActions]

Any updates regarding this?

[copy]

v86 is small project with a small number of non-fulltime contributors. As far as I know, nobody is currently working on this. If you really want it, feel free to contribute it yourself.

[iAmInActions]

im not good at wasm so i probably cant help

[BelleNottelling]

PAE was recently added, any reason to keep this open?

[copy]

Nope, fixed in #599.

[ayunami2000]

That's kinda sick ngl, can't wait to test this! Thank you so much for all the work put into this project, it really is awesome work that you are doing here!!

[iAmInActions]

Time to install Ubuntu 20.04 and Windows 7 or 8.1