Microprocessor interfaces

The letter shows that the use of frontend logic allows microprocessor interfaces to be designed systematically and simply, using logic-free channels. Their impletnentation requires no monostables, local clocks or any other form of timing signals.     

Logicfree data channels

The letter proves that no synchronising logic is needed for data transfers between a pair of devices that are triggered into action. This considerably simplifies the interface problem, and leads automatically to the design of device-independent digital systems.