# 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, 680×0, ARM, VAX.

(2002-06-26)

Tagged: o

Read Also:

- Orthogonalise
[awr-thog-uh-nl-ahyz] /ɔrˈθɒg ə nlˌaɪz/ verb (used with object), orthogonalized, orthogonalizing. Mathematics. 1. to make (vectors, functions, etc.) .

- Orthogonalize
[awr-thog-uh-nl-ahyz] /ɔrˈθɒg ə nlˌaɪz/ verb (used with object), orthogonalized, orthogonalizing. Mathematics. 1. to make (vectors, functions, etc.) .

- Orthogonally
[awr-thog-uh-nl] /ɔrˈθɒg ə nl/ adjective 1. Mathematics. 2. Crystallography. referable to a rectangular set of axes. /ɔːˈθɒɡənəl/ adjective 1. relating to, consisting of, or involving right angles; perpendicular 2. (maths) adj. 1570s, from French orthogonal, from orthogone, from Late Latin orthogonius, from Greek orthogonios “right-angled,” from ortho- “straight” (see ortho-) + gonia “angle,” related to […]

- Orthogonal matrix
noun 1. (maths) a matrix that is the inverse of its transpose so that any two rows or any two columns are orthogonal vectors Compare symmetric matrix