Let's Code a Minimal Assembler from Scratch in Python (100 Lines) 

Another solid video, clear,coscise and to the point. Thank you for sharing Slu4.

By building my own "TTL" homebrew cpu I've learned the hard way that whilst this video is alluring it doesn't explain the limitations and tradeoffs of the minimalistic approach. I don't have an academic compsci background and had never written an assembler or compiler before starting work on my own homebrew TTL cpu but ... as your instruction set and assembler becomes more sophisticated then a multipass assembler becomes increasingly complex and a tangle. In my experience parsing the ASM into an abstract syntax tree and then evaluating the tree, tend to lead to a more extensible and cleaner design. The benefits of the AST approach / lesson learned became more obvious as a learning exercise once one tries to build a high level language (eg something C like or whatever) for your home brew cpu - don't try it without an AST unless you love exercises in complexity. So I'd see the more scalable AST based approach for an assembler as a sensible stepping stone in learning how to build a compiler, but the multipass approach is definitely the initial approach most folk will end up with unless they have the premonition of storms ahead. AST's tend to end up using recursion as opposed to the itertive approach of multipass - but the result is worth it from a scalability point of view..

This was very helpful video. My CPU was waiting for an assembler until I found this video.

Well done, I'm surprised yet another time. This minimalizm idea is so addictive.

This channel deserves more subscribers, likes and views

Another beautifully minimalistic tool for the Minimal CPU. Way to go @Slu4 !

Thanks mate, your videos help me a ton!

Thanks for this, I want to write my own for my own minimal computer design and it's nice to see a method used. I need to finish up this very of the minimal soon as well!

Great content as always. Thank you!

Perfect video for my computer architecture thirst on a Saturday morning! Fascinating explanation of assembler operation and a great in insight into some broad Python concepts. A veritable tour de force!

Man !! You are incredible!!!

Amazing!!!!Cool :)

Einfach toll! Danke!

Lovely. I'm trying to make an assembly language for a programming game. I won't quite translate it to bytecode, instead I'll transpile it to Lua. I thought it would be fun to explore youtube for some videos about assemblers.

damn, that's an incredible video; just asking, do you have a discord server?

Will the upcoming Minimal CPU 1.5 require a board revision, or just a flash chip upgrade to something like the 28SF040? Just wanting to verify before I order boards.

can someone give list of syntax so I can understand what these mnemonics stand for?

That was very interesting. So now you can write you assembler in assembler and not need python, then after that Forth or C ?

the source code for the assembler is missing on your github link. please reupload

dude... you are a genius.... now come up with a highly optimized ISA of 255 instructions (byte size)... a 16 32bit register CPU with all registers also byte#4/word#2 addressable... a 32 bit addressable memory space... (a optional version will be 64 bit addressable) and you are in the right track for the cheap Universal-Processor that will be pervasive to all controllable devices... ;-)

WWhhaaao ! 😳 Great.

nice, but since you wrote this in python how was the first assembler written?

Thanks a lot. I want to write my own assembler to JVM bytecode compiler.

You should use regular expressions instead of these string functions. Makes your code smaller, faster and more readable (assuming you learned regex, which I advise all).

osea... estas traduciendo el codigo en hexadecimal para insertarlo en texto nuevamente y executarlo.. ... no seria mas facil y menos lineas traducir el hex dentro de un buffer y despues ejecutarlo al viejo y puro estilo de un shell code ? ..porque veo que de todas maneras veo que estas compilandolo el codigo asm para ver el codigo hexadecimal de las instrucciones..

Sub'd, thx

رائعة

deutsch? edit: hab gesehen in kanalinfo das der standort in deutschland ist

nomads of mongolia!

тще not be abAB USE ED)) COMPILE IN QWANT)) JORNEY YOU

I really like what you've done here. I'd like to have an assembler where the source file actually IS the Python (well, I'd prefer Ruby - but it's all the same) that way any constants or assemble-time expressions can be prepared or calculated in a nice scripting language. (we had something like this for the 6502 in BBC BASIC back in the 1980s) I've been looking at github.com/keystone-engine/keystone but it's far too complicated... I'm thinking I might be able to do something using a more minimal approach... and you've inspired me to try this again now.

ivea. to you. space in invaers