RISC stands for Reduced Instruction Set Computer. DSP stands for Digital Signal Processing. Hybrid processors combine elements of two or three of the major classes of processors. For more detailed information on these classes of processors, see processors . It also performs shift and rotate operations and other specialized operations.
Control units fetch and decode machine instructions.
Control units may also control some external devices. An internal bus is a bus inside the processor, moving data, addresses, instructions, and other information between registers and other internal components or units. For more information, see buses . RAM is Random Access Memory, and is the basic kind of internal memory. Most modern RAM is made from integrated circuits.