The Eurocom80552
What is it?
This first version is based on the first version of The Eurocom8052. I found out that I had some 80C552s laying around so I decided to create a version for this microcontroller. But with a big difference: I will not use 8155s but only the available onboard I/O ports and not implementing the two upper DIN-connectors.The schematic
The board
The Eurocom80552B
The whole idea of all designs was that the result could be placed in the original box. But when placed in the box, the Elektor bus could not be used. Then the idea rose to move the bus to the top-left and use a female DIN-connector instead of the original male one. Version B was born.In both this and the first version I used NAND gates to create the CLK2 signal for the Elektor bus and the OE signal for the EPROM.
The schematic:
The board:
You can email me here.