[[8bit Printer Ports|8bit Printer Port]] mods from german magazine [[Happy Computer (Schneider Sonderheft)]]:
* [[Happy Computer - Schneider Sonderheft |Happy Computer (Schneider Sonderheft)]] Nr.1 (2/1985) - original DIY for 464* [[Happy Computer - Schneider Sonderheft |Happy Computer (Schneider Sonderheft)]] Nr.3 (4/1986) - original DIY for 664/6128* [[CPC Schneider International]] (issue 5-1986, page 112) - remake of the Happy Computer DIY* [[PC Amstrad International]] (issue 8/9'91-1991, page 69-70) - remake of the Happy Computer DIY
* [[KC Compact]] - CPC clone with built-in Happy Computer-style 8bit printer port