公开(公告)号：US3626427A

公开(公告)日：1971-12-07

申请号：US3626427D

申请日：1967-01-13

Applicant: IBM

Inventor： MACSORLEY OLIN L ,  HASBROUCK LEO J ,  STETLER WESLEY C ,  HOLLERAN C RICHARD ,  GELLER ALAN R ,  KURTZ CLARK ,  NELSON ROBERT A ,  SMITH GORDON L ,  SPENCER DANA R ,  TIMM JOE F ,  WISSICK WILLIAM P ,  ALLEN RICHARD G ,  DUBOIS THOMAS F ,  HACK GEORGE E ,  ANNUNZIATA EUGENE J ,  HOSKINSON WILLIAM C ,  KING LEWIS E ,  JOHANSEN THORE-JAN

IPC: G06F15/78 ,  G06F9/00 ,  G06F3/00 ,  G06F15/00

CPC classification number: G06F15/78

Abstract: The specification discloses an illustrative embodiment for the invention comprising a large-scale data processing system of the type which is composed of a plurality of quasi-independent units. The environmental data processing system includes a central processing unit or portion, which is herein referred to as a CPU, a plurality of storage units, a plurality of input/output control devices referred to herein as channels, as well as control and maintenance facilities which are found in a power distribution unit, herein referred to as a PDU. The CPU of the environmental system includes a control or instruction unit hereinafter referred to as an I-unit, and an arithmetic and logic or execution unit, hereinafter referred to as an E-unit. The I-unit includes controls for instruction fetching, branching, interruption handling, communication with the input/output channels, and other related functions. The E-unit of the environmental system can perform algebraic and logical operations, moving, shifting, and other functions.