Louie Wong

All computers share the same basic architecture, whether it is a mainframe or a Palm Pilot. All have memory, an I/O system, and arithmetic/logic unit, and a control unit. This type of architecture is named Von Neumann’s Architecture after the mathematician, John Von Neumann who conceived of the design. John Von Neumann begins his “Preliminary Read More …

Programmed I/O Programmed I/O (PIO) refers to data transfers initiated by a CPU under driver software control to access registers or memory on a device. The CPU issues a command then waits for I/O operations to be complete. As the CPU is faster than the I/O module, the problem with programmed I/O is that the Read More …