64'er magazine is what forced me to learn German as a teenager (which is not super hard if you're a native Flemish-Dutch speaker.) The quality and technical com

64'er magazine is what forced me to learn German as a teenager (which is not super hard if you're a native Flemish-Dutch speaker.) The quality and technical complexity of their project-of-the-month was always stunning, and explained with amazing detail. One of their projects was a video genlock PCB that replaced the 1MHz crystal clock with one that was generated by a PLL (and slightly lower than 1MHz) so that the PAL output of the C64 was synchronized with an incoming video signal that was converted to RGB, selectively mixed with the C64 output, and then sent out as PAL again. It's how I learned about the existence of PLLs. :-) Another one of their projects replaced the 6502 firmware of the 1541 floppy drive with a database engine so that database queries were executed on the drive instead of on the C64 CPU. Amazing stuff. Edit: the block diagram of the genlock interface: https://www.pouet.net/topic.php?which=12851 https://www.pouet.net/topic.php?which=12851.