Show HN: My x86 emulator written in JavaScript

Post by annnnd » Fri, Oct 18, 2013, 6:47 AM UTC

chii wrote: post #111

g3 wrote: post #66

Earlier quoted context omitted.

Yes, it's very similar to the jslinux project. However, I added more hardware (it can boot a real bios: seabios). Also, I'll make this open source.

great to hear you are opensourcing this! I had a quick look at the minified source. its pretty hard to decipher (method names have been renamed too), unlike traditional minification which you can recover by just reformatting.

Post by valleyer » Fri, Oct 18, 2013, 7:05 AM UTC

femto wrote: post #60

JoshTriplett wrote: post #25

Very impressive. Interesting bug: I can't seem to type '-', '=', '+', or '_' into the Linux image. Missing '-' in particular makes it hard to run commands with options. Elaborate workaround: /root% eval eq$(dmesg | grep 'e820 update' | sed 's/.*) \(.\).*/\1\1/') /root% echo $eq = /root% eval dash$eq$(uname bad 2>&1 | grep Usage: | sed 's/.*\[\(.\).*/\1/') /root% echo $dash - /root% uname ${dash}a Linux (none) 2.6.34.…

I found that bug too. First thing I did was think, "a system restore is a page refresh away and I've always wanted to test the effects of this", then I attempted to type "rm -r /*".

Post by awy » Fri, Oct 18, 2013, 8:26 AM UTC

vinhboy wrote: post #121

awy wrote: post #85

Earlier quoted context omitted.

I recently posted about emulating the NES with JavaScript. http://blog.alexanderdickson.com/javascript-nes-emulator-par... Part 2 will be posted when it's done. :) If you want to get something done much quicker, have a go at emulating the Chip-8 VM. I also have a post, but it's less hand-holding than the first. http://blog.alexanderdickson.com/javascript-chip-8-emulator Good luck!

I really like your tutorial. I been trying to learn assembly and your tutorial is really helping me put the big picture together. I hope you continue to work on making it better.

Post by laumars » Fri, Oct 18, 2013, 8:43 AM UTC

JoshTriplett wrote: post #25

Very impressive. Interesting bug: I can't seem to type '-', '=', '+', or '_' into the Linux image. Missing '-' in particular makes it hard to run commands with options. Elaborate workaround: /root% eval eq$(dmesg | grep 'e820 update' | sed 's/.*) \(.\).*/\1\1/') /root% echo $eq = /root% eval dash$eq$(uname bad 2>&1 | grep Usage: | sed 's/.*\[\(.\).*/\1/') /root% echo $dash - /root% uname ${dash}a Linux (none) 2.6.34.…

    printf '\055'

    -

    eval eq$(printf '\075\075')

Post by a1369209993 » Fri, Oct 18, 2013, 9:07 AM UTC

shurcooL wrote: post #80

Sheepshow wrote: post #37

Earlier quoted context omitted.

This is the most soul-crushing category of bug, the kind which keeps me up all night, drinking. Build a skyscraper, and lock the keys inside for the ribbon cutting. Sorry pal you lost your funding Land on Mars, see an alien, but your camera is out of batteries and everybody back on Earth thinks you're a quack. Successfully perform open-heart surgery on a desert island, but muck up the stitches and cause a scar. Your…

Luckily, he was able to come up with a workaround. Here's a soul-crushing situation that doesn't have a workaround, as far as I can tell. You can play the original Deus Ex on OnLive. By default, it sets the fov to a very low number. It's only possible to change it in the console (there is no UI for it). But the console is disabled. However, you can get around that by pressing T, which creates a mini console with "say…