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Nativity #Forth is now self-hosting. Here is the Forth source of the assembler that bootstraps it. The binary size of the assembler is 2 KB. That is 1/1000 the size of Hello World in Rust.
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Not having POSTPONE or CREATE-DOES implemented, I always have to think very hard whenever I write a #forth defining-word. Anyway, here's MARKER. For those unfamiliar, it saves the current extent of the Forth dictionary so it can be restored later, discarding any data that was appended in the meantime. It works by defining a new word of user-specified name that, when invoked, restores the saved
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Progress disassembling MuLISP is much faster than Turbo Pascal. However there are some copies and an indirect jump that I haven't been able to follow yet. #reverseengineering
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Meanwhile, in a traditional 1960s or 1970s Lisp you would use FUNCTION, which would implement a FUNARG device that closes over the dynamic environment. However, I can't find a vintage environment offhand that lets me demonstrate this. Medley Interlisp-D seems to have dropped support at some point!
(BTW, in the Interlisp version of FUNCTION, it appears you still must specify a list of variables t
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Not having POSTPONE or CREATE-DOES implemented, I always have to think very hard whenever I write a #forth defining-word. Anyway, here's MARKER. For those unfamiliar, it saves the current extent of the Forth dictionary so it can be resto…
In a bookshop, I read a brief snippet of a Russian story with a phrase like "were you always like a bear, or did someone bearify you"? This is a hilarious translation, and now I regret not buying it and want to find the rest. The book wa…
My work's yearly eval feedback said that as an experienced engineer I should do more presentations, share more opinions and advice with the team, etc. Just polished and released an internal article on why we should not use LLMs for coding…
Progress disassembling MuLISP is much faster than Turbo Pascal. However there are some copies and an indirect jump that I haven't been able to follow yet. #reverseengineering
The last few hours vanished as I worked on reverse engineering Turbo Pascal v2.01 by grovelling through its disassembly in radare2. I don't know why I'm doing this. Disassemblies, of various completeness, of v1 and v3 are available alrea…
I suppose this means other people now can edit the language core without a warez copy of Borland Turbo Assembler from the late 80s... lol. I have a licensed copy and it never occurred to me that not everyone does.
In case anyone wants to look at the gnarly assembly dialect that my 2K assembler takes: https://gitlab.cs.washington.edu/fidelp/nativity-forth/-/blob/master/CORE.4SM
(When assembled, this produces a byte-for-byte identical CORE.COM as does…
Nativity #Forth is now self-hosting. Here is the Forth source of the assembler that bootstraps it. The binary size of the assembler is 2 KB. That is 1/1000 the size of Hello World in Rust.
Aha! If you can arrange for the "closures" to share structure, then you'll have the equivalent of "multiple functions closed over the same environment". Again in muLISP:(let ((alist '(quote ((x . 1)))))
(setq do+1 (closure nil '(lambda …
Meanwhile, in a traditional 1960s or 1970s Lisp you would use FUNCTION, which would implement a FUNARG device that closes over the dynamic environment. However, I can't find a vintage environment offhand that lets me demonstrate this. Me…
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