Method of handling machine-coded instruction words and data...

G - Physics – 06 – F

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354/230.8

G06F 9/30 (2006.01) G06F 9/318 (2006.01)

Patent

CA 1232075

29 ABSTRACT: The invention relates to a method of processing machine-coded instruction words. The instruction words each time comprise an opcode part and a descriptor part. The collection of opcode parts is subdivided into two classes. A first class comprises normal opcode parts which are processed in known manner, while a second class com- prises virtual opcode parts which are processed in a particular manner. This particular manner implies inter alia that the instantaneous program counter position is temporarily stored in a supplementary program counter register and that the memory address of an interpreting series of instructions is determined. The descriptor part of an instruction with virtual opcode is used in that series of instructions. The descriptor part can either be accessed by using the supplementary program counter register as index register in an extra instruction or is automatically made available in a specialized register.

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