this post was submitted on 20 Mar 2025
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For those unaware. Assembly language is not something you would ever really program a game in. Which is why it's so impressive that it was programmed this way. It's also a reason why the game ran so well on the hardware of the time.
In programming we talk about "high level" and "low level" programming languages. The level does not mean difficulty, in laymen's terms you can think about it about how "close" you are to programing by typing in 1s and 0s. If you're "low" you are very close to the ground level (the hardware). Obviously, no one programs in 1s and 0s because we created languages that convert human typed code into what a computer wants which is 1s and 0s.
Assembly is a very "low level" programming language. It's essentially as "close" to programing in 1s and 0s as you would ever get. It is still an important language today but no one in their right mind would ever program a game in it unless you were running with extremely strict hardware restrictions where every single bit of memory needed to be dealt with perfectly. Which is basically what Chris did.
Back then you wrote whatever you needed to be performant and/or that involved close access to the hardware in assembler. A game would definitely count. It's kind of nice to do, in many ways it's simpler than high level programming, you've just got a lot more to keep track of.
This isn't really true on modern systems anymore. Lower level languages like C and Rust are more or less just as performant as handmade assembly.
Sure, compilers have come a long way since then and there is vanishingly little you'd write in assembler now-a-days, and you'd probably drive yourself mad trying to do so on anything more complex than a microprocessor.
No disrespect, but I love that folks from the UK always say "assembleuh" like they were on their way to saying "assembly" and got spooked halfway through