Dragon Peripheral Controller (Electrónica Fácil magazine)
This is a DIY article to build a Peripheral controller that fits in the Dragon's cartridge slot and can control up to 4 devices. It uses a 6522 VIA (Versatile Interface Adapter) mapped to the Dragon memory.
It was published in the Issue 7/1993 of the spanish hobby electronics magazine Electrónica Fácil (Easy Electronics).
Magazine cover and article pages
- UM6522 datasheet (pdf)