Description
This project includes (almost) complete simulations of both the original PET2001-4 from 1977 and the improved PET2001-32N, aka CBM3032 or "dynamic PET".
The simulations are fairly compatible with the real systems - down to the Microsoft easter egg in the dynamic PET and the screen sparkles in the original PET.
They are a great tool to see how these early personal computers actually work.
How the video output is generated with just a few TTL-Logic chips and how the dynamic RAM is refreshed regularly without affecting CPU performance.
They could also be used to debug real hardware by comparing the expected signals from the simulation to the actual signals from the device under test.
And there is the "blinkenlights" aspect, where you can just admire all the signals wiggling millions of times even for a single blink of the cursor.
Check the link to my blog to read more about this project and how to use it.
The simulations are fairly compatible with the real systems - down to the Microsoft easter egg in the dynamic PET and the screen sparkles in the original PET.
They are a great tool to see how these early personal computers actually work.
How the video output is generated with just a few TTL-Logic chips and how the dynamic RAM is refreshed regularly without affecting CPU performance.
They could also be used to debug real hardware by comparing the expected signals from the simulation to the actual signals from the device under test.
And there is the "blinkenlights" aspect, where you can just admire all the signals wiggling millions of times even for a single blink of the cursor.
Check the link to my blog to read more about this project and how to use it.