Uploaded May 2026 | Updated September 2026, 3 weeks ago
Our EmuDevz JavaScript emulator is finally finished! And now on to the next challenge...writing an NES emulator in Haskell!
Thumbnail painting: "Napoleon Crossing the Alps", by Jaques Louis-David (1801). The version now hanging in Charlottenburg Palace.
0:00 - Introduction
1:50 - Praise for EmuDevz
3:30 - Comments on Javascript
4:00 - Let's do it again in Haskell!
7:29 - Writing Very Imperative Haskell
8:45 - Monads as a way of threading data
9:40 - Type safety is the best
10:45 - More praise for EmuDevz
Our EmuDevz JavaScript emulator is finally finished! And now on to the next challenge...writing an NES emulator in Haskell!
Thumbnail painting: "Napoleon Crossing the Alps", by Jaques Louis-David (1801). The version now hanging in Charlottenburg Palace.
0:00 - Introduction
1:50 - Praise for EmuDevz
3:30 - Comments on Javascript
4:00 - Let's do it again in Haskell!
7:29 - Writing Very Imperative Haskell
8:45 - Monads as a way of threading data
9:40 - Type safety is the best
10:45 - More praise for EmuDevz
![Wordle - on an Apple ][!](https://i.ytimg.com/vi/Q76OnQnY4w8/mqdefault.jpg "Wordle - on an Apple ][!
This week’s video is about Wordle, BASIC, and 8-bit computers. It’s based off a great tweet from one Katie Anderson, katie_panda on Twitter, who wrote a BASIC version of Wordle for the BBC Micro computer, and then went so far as to make a “magazine page” for it in the style of the old game listings from Creative Computing.
For those of you too young to remember this, in the late 1970s and early 1980s, one of the most popular ways of distributing programs wasn’t disk, or even cassette tape, but just…paper. Magazines would have program listings in them - sometimes very, very long program listings, and you would type them in to your computer, run them, and probably save them to cassette or disk yourself. Katie went to the trouble of making this BBC game, so today we’re going to type this listing in to an Apple ][ and see if it works.
When you’re transcribing a game like this, there are three main types of errors. First, sometimes you’d simply type something in wrong. Second, sometimes the programs in the magazine themselves would have typos. Third, sometimes the program would be written for a computer other than the one you were using, and so the commands wouldn’t work the same! Today, I can almost promise you that we’ll see all three of these sorts of errors.
The fun part, though, is that it was the process of encountering and fixing these errors that gave a lot of people their start in programming. Typing in a program is definitely a ponderous way to get your start in computers, but it’s actually a surprisingly effective way to learn.
Let’s hop over to the Apple ][ and get to work.")
