Very important for C16 / +4 - Hardware areSolder and Hannes. They devoloped and spreaded the 256k-expansion.

Nevertheless my friend Marc Peter and I have developed some interesting things :

• improve the 256k-expansion to 1Mb RAM (and it is still compatible!)
• a very simple sRam-expansion, using only 4 IC's
• a simple serial port for the C16
• the connection of the VC 2031 (predecessor of the 1541, with parallel IEEE488-bus)

If I got enough time, I will draw the schematics and put them here.