Commodore · code
Adding very large integers in 8 Bit BASIC
Adding integers with hundreds of digits using string manipulation in Commodore BASIC. When your numbers are too big for Wolfram Alpha.
C64 · code
The terrible random number generation in the Commodore 64 (and 128)
Visualizing the poor randomness of RND() on the Commodore 64 and 128 compared to the PET and Plus/4. Clear patterns emerge when you plot the output.
Commodore · hardware
Getting green and amber screens from a MiniPET 40/80
Adding green and amber screen colors to the MiniPET 40/80 replica using a cheap monochrome VGA color adapter from Tindie.
C64 · code
Just for fun, the 100 door problem on several different systems
Solving the classic 100 door problem with visual output on multiple vintage systems: VIC-20, C64, PET, Atari, and Color Maximite.
C64 · code
Running Commodore 64 BASIC Programs on a PET
How to load and run Commodore 64 BASIC programs on a PET. Working around the PET’s lack of program relocation.