Bisqwit writes a NES emulator in C++ in about 15 minutes of tool-assisted, sped-up coding, narrated with captions. It shows an accurate emulator built with a compile-time generated 6502 instruction table. Part 2 covers compiling and running it.
Why Hacker News points people here: HN programmers admire it as a clean, clever demonstration of emulator design and as the standout of a favorite programming YouTuber.
“Here's a very clean and clever NES emulator in C++ by Bisqwit of TAS fame”HN comment, 2015
“My favourite programming YouTuber by a long stretch.”
Classic video among favorite programming YouTuber's work.
Full comment
Agreed. My favourite programming YouTuber by a long stretch. If anyone is unfamiliar with him and wants to watch some of the "classics" I'd recommend these: His "cracking videogame passwords" series: link Creating a Doom-style 3D engine in C: link Creating a Rogue-like game in C++11: link Creating a PIC16 emulator and NES music player: link Creating a NES emulator: this video Creating a DOS VGA raytracer: link
RecommendspetercooperApr 2014
“always blows my mind when he does his coding videos”
Coding videos like building a NES emulator.
Full comment
link record high quality videos at many programming conferences each year and then share the recordings on YouTube. So much to enjoy here, especially if you're open source leaning, like most of the events they do. O'Reilly puts up lots of good stuff at link although the webinar recording quality leaves a lot to be desired. A real random set of tech topics though and often something worth watching. Entrepreneur - link - usually puts up lots of short videos with a business tip in or something. Sometimes longer interviews. Usually worthwhile if a little superficial at times. The guy who founded Something Awful has a ridiculously addictive channel - link - he generally plays horrifically poorly produced indie games with his sidekick Shmorky and I could listen to their absurdist banter all day. It's a bit of a mish mash but link always blows my mind when he does his coding videos such as coding a NES emulator in C++11: this videolink is awesome if you're into supercars. He's currently doing a tour of European supercar events and factories putting up a video each day. Far Lands or Bust - link - is a guy who started to walk towards the 'far lands' in a Minecraft maps years ago. He's something like 10% of the way but is still plodding along recording his progress. This is a real pilgrimage with all the highs and lows that entails. MrThaiBox123 - link - is a British IT expert who seems to have an endless supply of cash to buy gadgets, phones, and amazing computer setups.
RecommendsatestiMar 2015
“Here's a very clean and clever NES emulator in C++ by Bisqwit of TAS fame”
Clean NES emulator coded at tool-assisted speed.
Full comment
Here's a very clean and clever NES emulator in C++ by Bisqwit of TAS fame: this video He presents the code in the style of a tool assisted run, typing it in in high speed. I never saw templates used like that to create the unrolled CPU dispatcher
RecommendspetercooperOct 2016
“is by far my favorite and I've spent many hours watching him”
Channel favorite that creates a NES emulator.
Full comment
link is by far my favorite and I've spent many hours watching him. He does things like create a Doom-style engine from scratch: link .. create a NES emulator: this video .. work back from a C++17 example to show why new C++ standards are needed: link .. and even building a Tetris clone in GW-BASIC: link .. Right now, he's doing a series on cracking 80s videogame passwords: link Sirajology - link - is another interesting one. He moves a bit too quickly for me, but does things like explain machine learning in 5 minutes or how to generate music with systems like Tensorflow.
RecommendsmolticrystalOct 2022
“there is a nice video series short in minutes(time)”
Tool-assisted coding journey of making an NES emulator.
Full comment
Those who enjoy this might also enjoy "Creating a NES emulator in C++11" [0] [1] [2] while not short in bytes of code(space) there is a nice video series short in minutes(time). Bisqwit takes you on a 30 minute tool assisted coding journey of making an NES emulator and also provides a 15 minute followup Q&A video explaining different aspects. [0] this video [1] link [2] link
Yes. It is certainly more pithy. ACTUALLY! It reminds me of a technique Bisqwit used when he made his emulator. He used strings to define the behavior of certain instructions, the strings were actually interpreted at compile time. Though I think this is a C++ specific trick. this video he brings in the instruction table at 1:30
Cites itgrapeshotDec 2013
“Here's a very apropos example of this technique as applied to the 6502.”
Template-generated opcode dispatch for 6502.
Full comment
It's possible to do something like that in C. In C++, you can even do some template magic to create all the appropriate functions for each opcode based on something like the original instruction decode ROM. Brilliant and short code, but very difficult to write in the first place. Here's a very apropos example of this technique as applied to the 6502. this video
Cites itiofjAug 2015
“I love having streams of coding open while working.”
Full comment
I love having streams of coding open while working. It makes me type faster (I think). Sound is off though. this video
Cites it0xcde4c3dbNov 2018
“There's even a sort of tool-assisted speedrun of writing an accurate NES emulator”
Tool-assisted speedrun of writing an accurate NES emulator.
Full comment
The main advantage to NES emulation is that it's a very mature area of study. High-quality documentation is much more readily available than for other systems, and there's more public discussion of the specific problems that NES emulator authors encounter (both primarily on nesdev.com [1] [2]). There's even a sort of tool-assisted speedrun of writing an accurate NES emulator, if you're into that sort of thing [3] [4]. [1] link [2] link [3] this video [4] link
