Europe Card Bus

The Europe Card Bus (ECB or ECB-bus[1]) is a computer bus developed in 1977 by the company Kontron, mainly for the 8-bit Zilog Z80, Intel 8080 and Intel 8085 microprocessor families.

Mechanically, the ECB is usually implemented as a backplane circuit board installed in a 19-inch rack chassis.

This line is reserved for carrying a battery backup voltage to boards that supply or consume it.

In practice, this means that most boards requiring backup power tend to play safe and have a battery on board, often with a link to allow it to supply or accept power from +5 V Bat.

I/O space is limited to 4K, to simplify I/O address decoding to a practical level.

The number of Attention Requests reflects that the ECB-bus aims to be simple.

The Retrobrew Computer Group has expanded the definition of ECB Pinouts[4] as well as I/O Port usage guidelines.