Merry Christmas

Michael Doornbos

Dec 24, 2020 • 1 min read

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A visual 100 Door Problem solution in Python

Last year, we did the 100 door problem on many platforms in BASIC and Assembly language. The 100 door problem is: There are 100 closed doors in a row.You walk past the doors 100 times (100 passes)The first time, visit every door. If the door is closed, open

Michael Doornbos Jan 11, 2022 • 2 min read

Permutations of 1 to 9 in Python, BASIC, and 6502 Assembly

Someone asked me this week if I would help him with a graph theory problem on 8-Bit machines. The first task was to get all permutations of 1 to 9. Since the total permutations is 9! (362,880) I knew this would take a while. Learning without learning, the standard

Michael Doornbos Dec 20, 2021 • 5 min read

Making and breaking codes Part 14- VIC Cipher on the Commodore VIC-20

I love pretty good encryption that requires nothing but a pencil and paper, or a deck of cards. VICTORIn the twentieth century, Soviet spies used a simple paper cipher based on the codename VICTOR of a Soviet agent spying in the United States under the name Reino Häyhänen. In 1957

Michael Doornbos Dec 16, 2021 • 4 min read

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