公开(公告)号：US3360780A

公开(公告)日：1967-12-26

申请号：US40227364

申请日：1964-10-07

Applicant: BELL TELEPHONE LABOR INC

Inventor： FABISCH MICHAEL P

IPC: G06F9/312 ,  G06F9/315 ,  G06F9/318

CPC classification number: G06F9/30043 ,  G06F9/30032 ,  G06F9/30185

公开(公告)号：US3569939A

公开(公告)日：1971-03-09

申请号：US3569939D

申请日：1967-11-24

Applicant: BELL TELEPHONE LABOR INC

Inventor： DOBLMAIER ANTON H ,  DOWNING RANDALL W ,  FABISCH MICHAEL P ,  HARR JOHN A ,  NOWAK JOHN S ,  TAYLOR FRANK F ,  ULRICH WERNER

IPC: G06F9/308 ,  G06F9/38 ,  H04Q3/545 ,  G05B19/00

CPC classification number: G06F9/30018 ,  G06F9/3875 ,  H04Q3/5455 ,  H04Q3/54591

Abstract: Improvements in data processor systems to increase data handling capabilities and to conserve memory space. The improvements are accomplished by parallel execution of independent data processing actions, by providing single cycle execution of functions which customarily require several program steps, and by optimizing the use of instruction code space and data space in memory.

公开(公告)号：US3568157A

公开(公告)日：1971-03-02

申请号：US3568157D

申请日：1967-11-24

Applicant: BELL TELEPHONE LABOR INC

Inventor： DOWNING RANDALL W ,  FABISCH MICHAEL P ,  HARR JOHN A ,  NOWAK JOHN S ,  TAYLOR FRANK F ,  ULRICH WERNER

IPC: G06F9/48 ,  G06F11/00 ,  H04Q3/545 ,  G06F9/18

CPC classification number: G06F9/4812 ,  G06F11/00 ,  G06F11/008 ,  H04Q3/52 ,  H04Q3/5455 ,  H04Q3/54591

Abstract: A program controlled telephone switching system is shown as an example of a real time program controlled data processing system. The system work functions of the telephone switching system are performed at assigned levels of a priority hierarchy. This hierarchy includes a base level at which routine jobs are performed, timed interrupt levels at which input-output jobs, which require a fair degree of timing precision, are performed and a plurality of trouble interrupt levels (maintenance interrupt levels), which are employed to initiate remedial actions in accordance with a prescribed remedial plan. The telephone functions which are performed at the base level are allocated processor time in accordance with a base level executive program frequency table. The base level executive program provides time for execution of certain low priority maintenance functions. In the absence of trouble the processor time is shared by the timed interrupt level programs and the base level programs. The trouble interrupt programs are initiated upon the detection of corresponding classes of trouble.