Abstract: An instruction set is provided that features multiple instructions and various address modes to deliver a mixture of flexible microcontroller-like instructions and specialized digital signal processing (“DSP”) execute instructions from a single instruction stream. A subset of instructions of the instruction set can be executed by a processor. Similarly, another subset of the instructions can be utilized by the digital signal processor. A software application can thus take advantage of digital signal processing capabilities in the same program, obviating the need for separate programs for separate processors.

Abstract: A method, system and apparatus are providing fast access to memory in a stack. The system and apparatus include an address bit, a stack pointer, and fast access random access memory (“RAM”). The method provides that, when a first address mode is used in conjunction with the address bit and the stack pointer, the location of the access RAM can be shifted in order to achieve an index of literal offset address mode.