MDB (Multi-Drop Bus) is a standard from the 80's for connecting peripherals such as bill acceptors, coin dispensers and credit card terminals inside vending machines to the master MDB device, the Vending Machine Controller (VMC): The technology used is robust and time proven, but not compatible with USB, serial or network interfaces. It uses a different electrical interface and 9 bit data. In addition, very quick answers are required, hard to achieve with generic computers. The MDB interfaces presented here solve that problem and allow a very easy and reliable connection between a vending machine with MDB bus interface and computers of all kinds... The MDB-USB Ultra by Qibixx is the newest improvement on our MDB to USB converter product line. It connects the vending machine controller (VMC) to Multi Drop Bus controlled devices and works driverless on Linux, Mac and Windows... The MDB interface can be configured to work as a Slave or a Master on the MDB bus. This means that the..