Moving Forth - Internals and TTL ProcessorJuergen Pintaske, Brad Rodriguez
Moving Forth - Internals and TTL Processor
by Juergen Pintaske, Brad Rodriguez · first published 2018
7mentions
5recommended by
6HN commenters
2016–2023first – last mentioned
83% recommend17% neutral
Why HN recommends it
Explains how Forth works internally, covering its implementation on various processors and metacompilation. It is the best read for understanding Forth's internals and simplicity.
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…this stuff, despite the ubiquity of smart phones etc. I just uploaded the code to github: https://github.com/hoytech/tiforth To anyone else interested in really understanding forth, Brad Rodriguez's "Moving Forth" series is the best I've ever read (and I don't imagine much has changed since), including a great explanation on "DOES>", widely regarded as the most difficult part of the forth kernel. You can read…
on “Zkeme80 – A Forth-Based OS for the TI-84+ Calculator” ↗For those trying to grok Forth implementation, I cannot recommend Brad Rodriguez' "Moving Forth" [1] series enough. But my favorite one is "1st, 3rd and almost 4th" [2]. Oh, and Loeliger's classic book on the subject [3]. [1] https://www.bradrodriguez.com/papers/ [2] http://www.ioccc.org/1992/buzzard.2.design…
on “Jonesforth: Implementing Forth in Assembly” ↗Oh I love FORTH. Good set of articles here called Moving FORTH by Brad Rodriguez discussing the implementation of FORTH on various legacy ISAs. Worth a read to understand the internals and beauty of the simplicity of it: http://www.bradrodriguez.com/papers/moving1.htm…
on “Byte Magazine: The Forth Language (1980)” ↗Moving Forth is pretty good: http://www.bradrodriguez.com/papers/moving1.htm There are 8 parts to the series, you can look at all of them and other Forth writings by the author on his website: http://www.bradrodriguez.com/papers/
on “Register-based VMs have a higher performance than stack-based VMs” ↗…alongside with Joy) is based on indirect-threaded code (ITC), so the connection between ROP and stack-based programming is rather indirect (pun intended). For anyone interested, Book by Loeliger [1] and "Moving Forth" series [2] are essential readings on this topic. [1]: https://archive.org/details/R.G.LoeligerThreadedInterpretive... [2]: https://www.bradrodriguez.com/papers/
on “Stack-Oriented Programming” ↗It would be more accurate to describe a metacompiler as a cross compiler to the machine an interpreted Forth is implemented on. I recommend Moving Forth [1] for the full explanation. (That's the part that addresses metacompliers, the rest is still quite a great book.) [1] https://www.bradrodriguez.com/papers/moving4.htm
on “Show HN: PlanckForth – Bootstrapping an interpreter from handwritten 1kb binary” ↗…and the next-stack. The i-stack contains the current value(s) being iterated over, and is read from with the i and j words like normal. So much of what we do has already been done. In Brad Rodriguez' "Moving Forth" series (c 1993) he talks about classical Forth having 5 registers, 2 of which point to stacks. He then explores which of these 2 could point to a hardware stack, and how this decision has been taken…
on “A Forth Vocabulary for Iteration” ↗