Stories
Slash Boxes
Comments

SoylentNews is people

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

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

 
This discussion has been archived. No new comments can be posted.
Display Options Threshold/Breakthrough Mark All as Read Mark All as Unread
The Fine Print: The following comments are owned by whoever posted them. We are not responsible for them in any way.
  • (Score: 3) by driverless on Monday October 08 2018, @05:10AM (2 children)

    by driverless (4770) on Monday October 08 2018, @05:10AM (#745821)

    Summer of '83, we had black and white cameras and a darkroom for half the day, and PCs with Logo for the other half.

    And even with two halves spoken for, there were somehow breaks and lunch left over. Those were mostly spent listening to music by the fence.

    I had "Wierd Al Yankovic" and "Speaking in Tongues" on cassette.

    Then it was quiet again. My attorney had taken his shirt off and was pouring beer on his chest, to facilitate the tanning process. “What the hell are you yelling about?” he muttered, staring up at the sun with his eyes closed and covered with wraparound Spanish sunglasses. “Never mind,” I said. “It’s your turn to drive.” I hit the brakes and aimed the Great Red Shark toward the shoulder of the highway. No point mentioning those bats, I thought. The poor bastard will see them soon enough.

    Starting Score:    1  point
    Moderation   +1  
       Underrated=1, Total=1
    Karma-Bonus Modifier   +1  

    Total Score:   3  
  • (Score: 2) by captain normal on Monday October 08 2018, @05:31AM

    by captain normal (2205) on Monday October 08 2018, @05:31AM (#745825)

    Hey!! Leave Hunter Thompson out of this. He's innocent I swear.

    --
    When life isn't going right, go left.
  • (Score: 0) by Anonymous Coward on Monday October 08 2018, @04:10PM

    by Anonymous Coward on Monday October 08 2018, @04:10PM (#746005)

    Parent was not spam, you ignorant fucks. Go read a book.