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 |
