公开(公告)号：DE2966069D1

公开(公告)日：1983-09-22

申请号：DE2966069

申请日：1979-09-24

Applicant: IBM

Inventor： BERGLUND NEIL CLAIR ,  CROWLEY RICHARD DOUGLAS ,  KEMPKE WILLIAM GEORGE ,  RICHARDSON WILLIAM CAIN

IPC: G06F9/22 ,  G06F9/26 ,  G06F9/30 ,  G06F9/318 ,  G06F9/32 ,  G06F9/06 ,  G06F13/00

Abstract: An I-fetch control system for a computer includes a control store (30) for storing end op, I-1, I-2 and return words. A microinstruction decode and control unit (170) responds to end op words to initialize and personalize computer components to facilitate subsequent execution of a high level instruction. The control unit (170), in conjunction with a next address logic (162), selects the next @micro-instruction @ to be executed in response to a high level instruction. The control unit (170) and logic (162) are responsive to I-1 words to personalize the computer and to select a microinstruction to begin E-phase of a high level instruction. In response to I-2 control words, the control unit (170) and logic (162) select an operand fetch routine in the control store (30), and write a first E-phase address into a local store (138). The return word gates the first E-phase address from the local store (138) to select a microinstruction in the control store (30) to being E-phase.

公开(公告)号：DE2964732D1

公开(公告)日：1983-03-17

申请号：DE2964732

申请日：1979-09-24

Applicant: IBM

Inventor： ABERLE GARY FRANCIS ,  BALM GERALD JOHN ,  BERSTIS VIKTORS ,  GREGG LEON EDWARD ,  HU KUANG-CHI ,  RICHARDSON WILLIAM CAIN ,  SCHARDT TERRY LYLE ,  RANWEILER JAMES GREGORY ,  WATSON CHARLES THOMAS

IPC: G06F12/14 ,  G06F9/46 ,  G06F9/52 ,  G06F12/00 ,  G06F13/00

Abstract: In a multitasking restricted access data processing system a common compact mechanism is provided for resolving access conflicts automatically irrespective of the category of restriction tread access, modify access or destroy access; the type of restriction (shared or exclusive) of the origin of the restriction (user specified or instruction implied). The mechanism operates by testing codewords (34) totally defining the access restriction in relation to a newly required access and currently in force access restrictions in relation to the inhabitants of a chained list (24) associated by a hashed object address form (18) access being denied, held pending until released or a time-out exception occurs or granted, the list appropriate to the transaction being updated accordingly and also updated as restrictions are released.

公开(公告)号：DE69111635T2

公开(公告)日：1996-05-02

申请号：DE69111635

申请日：1991-02-05

Applicant: IBM

Inventor： CHENG CHINGSHUN ,  PORTER SCOTT LYON ,  RICHARDSON WILLIAM CAIN ,  ROY PAUL JULIUS

IPC: G06F1/00 ,  G06F11/22 ,  G06F12/16 ,  G11C29/08 ,  G11C29/00

公开(公告)号：DE69111635D1

公开(公告)日：1995-09-07

申请号：DE69111635

申请日：1991-02-05

Applicant: IBM

Inventor： CHENG CHINGSHUN ,  PORTER SCOTT LYON ,  RICHARDSON WILLIAM CAIN ,  ROY PAUL JULIUS

IPC: G06F1/00 ,  G06F11/22 ,  G06F12/16 ,  G11C29/08 ,  G11C29/00

公开(公告)号：DE2965935D1

公开(公告)日：1983-08-25

申请号：DE2965935

申请日：1979-09-24

Applicant: IBM

Inventor： BERGLUND NEIL CLAIR ,  KEMPKE WILLIAM GEORGE ,  RICHARDSON WILLIAM CAIN

IPC: G06F9/22 ,  G06F9/28 ,  G06F9/38