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Time: 2018-10-04 18:35:48 UTC

Original URL: https://blog.adafruit.com/2018/10/04/the-apple-ii-source-code-for-the-logo-language-found/ [adafruit.com] using UTF-8 encoding.

Title: The Apple II Source Code for the LOGO Language Found

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The Apple II Source Code for the LOGO Language Found

Arthur T Knackerbracket has found the following story [adafruit.com]:

Adafruit visited the history of the LOGO “turtle graphics” language not long ago [adafruit.com].

Now on Twitter, folks have found the source code for the LOGO program used on Apple II computers. Source on GitHub [github.com].

It turns out that the program was written on a DEC PDP-10 minicomputer running the Incompatible Timesharing System (ITS).

I’d take it that the code is in 6502 assembly and the program works the whole Apple II memory map for functionality. Did ITS have a 6502 cross-compiler or did the MIDAS program have separate target environments?

Very interesting programming archaeology – see the source code yourself [github.com] along with the full PDP-10 ITS image [github.com] still maintained today.

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In case you want to see/relive what Apple II Logo looked like, here’s a video of it running on the Apple II GS:

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