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Documented other implementations of Lisp 1.5 that I (now) know of.

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Simon Brooke 2025-09-24 17:19:02 +01:00
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@ -48,11 +48,20 @@ Because Lisp is the only computer language worth learning, and if a thing
is worth learning, it's worth learning properly; which means going back to
the beginning and trying to understand that.
Because there is, so far as I know, no working implementation of Lisp 1.5
for modern machines.
Because I'm barking mad, and this is therapy.
#### There are other barking mad people out there
Since I wrote Beowulf, I've become aware of other modern reimplementations of Lisp 1.5:
1. [Kenichi Sasagawa's in C](https://github.com/sasagawa888/lisp1.5);
2. [Ichigo Lisp, in JavaScript, which compiles to Web Assembly](https://github.com/zick/IchigoLisp);
3. [Geert Bosch's implementation in ADA](https://github.com/GeertBosch/lisp);
There are probably others.
In addition, [this](https://github.com/informatimago/lisp-1-5) appears to be a transcription of the original IBM 709 card deck for the Lisp 1.5 system. There's an IBM 709 emulator [here](https://github.com/Bertoid1311/B7094) on which it might be possible to actually run this.
### Status
Working Lisp interpreter, but some key features not yet implemented.