The story of FCopy for the C-64
by Thomas Tempelmann, reprinted with permission.
Some Assembly Required
by Thomas Tempelmann, reprinted with permission.
Ron Gilbert posted this as a comment on The Mansion – Technical Aspects, I am re-posting it here as an article.

by enthusi
It seems that a lot of readers of pagetable.com are fans of SCUMM games like Maniac Mansion (and at least one is their creator). Here is a puzzle for you (credits go to Bernhard Bauer):
In a discussion, when pointing out inconsistencies in your opponent’s opinion by giving two examples that you disagree with, remember that it can be made into a point against you, just by inverting the two examples – plus/minus some rhetorical decoration.
If you read about operating system security, it seems to be all about how many holes are discovered and how quickly they are fixed. If you look inside an OS vendor, you see lots of code auditing taking place. This assumes all security holes can be found and fixed, and that they can be eliminated more quickly that new ones are added. Stop fixing bugs already, and take security seriously!
Update: The source is available at github.com/mist64/fastboot1541

Nobody doubts that the C64 was the greatest selling single computer model of all time, it even made it into the Guinness Book of World Records, but nobody quite knows how many it really was: Most sources say 17 million, others say 22 or even 30 million. With a high degree of confidence, I can now say that Commodore only sold 12.5 million units – how I would know that, you ask, and how do I dare to contradict well-known facts? By analyzing serial numbers!
The Commodore Plus/4, the C16 and the C116 from 1984 were members of the 6502-based “TED” series, named after the 7360 TED (“Text Editing Device”) video controller. The TED systems were basically the low-cost cousins of the C64: The overall system architecture and the video chip are very similar to the C64’s, but they lack certain features like hardware sprites. On the other hand, there are some added features like extra colors and more control over the internal timing of the video chip.
The “Final Cartridge III” has been among the most popular Commodore 64 extensions, providing a floppy speeder, BASIC extensions, a machine language monior, a freezer and even a (rarely used) graphical desktop. The major advantage compared to other C64 cartridges is the consistent way in which the Final Cartridge III extends the C64 experience.
Here is the video recording of my presentation “Reverse Engineering the MOS 6502 CPU” given at 27C3, on the low cost CPU that arguably launched the home computer revolution.