=== Happy Computer 8bit Printer Port upgrade (DIY) ===
A good method to upgrade to full 8bit has been described in the german magazine "[[Happy Computer (Schneider Sonderheft )]] 2/85 and 4/86":
* Disconnect the D7 pin from ground, and wire it to the [[8255|PIO]]s Tape WR DATA pin instead (That is, Pin 12 of the 8255 chip).
* For details see: [[Happy Computer 8bit Printer Mod]]
The same way to upgrade the == CPC printer port to Schneider International aka PC Amstrad International - 8bit is also described in the Printer Port Mods == * Mod 1 (1985): [[CPC Schneider International]] (issue 12'85), this solution uses joystick port pin 8 (or (keyboard?) pin 2, unclear?). * Mod 2 (1991): Some years later, the same (renamed) magazine released another 8bit printer port mod: [[PC Amstrad International ]] (issue 8/9'91, page 69), this solution uses PPI.Pin12 (same as the [[Happy Computer 8bit Printer Mod]]).
=== 8bit Printer Port in KC Compact ===