If uploading software from the Arduino IDE or the commandline via avrdude to a microcontroller like an Arduino or an ESP8266 fails due to missing access rights ("Permission denied"), what helps is either
sudo chmod a+rw /dev/ttyUSB0
or adding the user to the group "dialout":
sudo usermod -a -G dialout theuser
The manual of the Super Snapshot V5 mentions that the 8kB RAM chip of the cartridge can be upgraded to 32kB. Back in the days™ it was possible to send the cartridge to LMS Technologies. Nowadays this is not an option anymore and I was happy to find an article by Chris Kobayashi which describes the required steps. Since the article does not contain any illustrations, I decided to share some photos I took when I changed the RAM of my Super Snapshot V5.
In an act of clumsiness I pulled off the cables connecting the reset button of my Super Snapshot V5 and the PCB. I asked Twitter and Mastodon for help, but to no avail. The search engine of my choice also did not come up with any helpful link. Luckily information about the Commodore 64 is all over the web. Read more