Orthogonal instruction set




<architecture> An instruction set where all (or most) instructions have the same format and all registers and addressing modes can be used interchangeably - the choices of op code, register, and addressing mode are mutually independent (loosely speaking, the choices are "orthogonal").

This contrasts with some early Intel {microprocessors} where only certain registers could be used by certain instructions.

Examples include the PDP-11, 680x0, ARM, VAX.



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ORM
orphaned i-node
orphan process
ORTHOCARTAN
orthogonal
Advanced RISC Machine
orthogonal
Orwell
OS
OS2
OS/2
OS/360