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The Apple II Source Code for the LOGO Language Found

posted by martyb on Sunday October 07 2018, @01:14PM   Printer-friendly
from the have-you-ever-programmed-a-6502? dept.

Arthur T Knackerbracket has found the following story:

Adafruit visited the history of the LOGO "turtle graphics" language not long ago.

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

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 along with the full PDP-10 ITS image still maintained today.

-- submitted from IRC

Original Submission

 
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  • (Score: 2) by dry on Monday October 08 2018, @02:06AM

    by dry (223) on Monday October 08 2018, @02:06AM (#745771) Journal

    IIRC, the original Apple II didn't automatically boot, not even sure if it came up in basic or in the monitor and the usual was typing in 6p or something similar to boot. Adding the language card (original with Applesoft in ROM) may have updated it to boot on power up.

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