公开(公告)号：DE68923863D1

公开(公告)日：1995-09-21

申请号：DE68923863

申请日：1989-12-11

Applicant: IBM

Inventor： CHANG ALBERT ,  LEROM GEORGE ALBERT ,  NICHOLSON JAMES OTTO ,  O'QUIN III JOHN CLAUDE ,  O'QUIN II JOHN THOMAS

IPC: G06F12/08 ,  G06F12/14 ,  G06F13/12 ,  G06F21/24

Abstract: A cache for use with input/output devices attached to an input/output bus. Requests for access to system memory by an input/output device pass through the cache. Access authority is checked to determine whether an input/output device is authorised to access that particular page. If it is not, access is denied. Each input/output device has access to a portion of the cache, so that activity by one device will not interfere with activity by another.

公开(公告)号：DE3750824D1

公开(公告)日：1995-01-19

申请号：DE3750824

申请日：1987-01-08

Applicant: IBM

Inventor： CHANG ALBERT ,  MERGEN MARK FREDERICK ,  O'QUIN II JOHN THOMAS ,  O'QUIN III JOHN CLAUDE ,  ROGERS MARK DOUGLAS

IPC: G06F9/48 ,  G06F12/10 ,  G06F9/46 ,  G06F13/10

公开(公告)号：DE68923863T2

公开(公告)日：1996-03-28

申请号：DE68923863

申请日：1989-12-11

Applicant: IBM

Inventor： CHANG ALBERT ,  LEROM GEORGE ALBERT ,  NICHOLSON JAMES OTTO ,  O'QUIN III JOHN CLAUDE ,  O'QUIN II JOHN THOMAS

IPC: G06F12/08 ,  G06F12/14 ,  G06F13/12 ,  G06F21/24

Abstract: A cache for use with input/output devices attached to an input/output bus. Requests for access to system memory by an input/output device pass through the cache. Access authority is checked to determine whether an input/output device is authorised to access that particular page. If it is not, access is denied. Each input/output device has access to a portion of the cache, so that activity by one device will not interfere with activity by another.

公开(公告)号：DE3750824T2

公开(公告)日：1995-05-24

申请号：DE3750824

申请日：1987-01-08

Applicant: IBM

Inventor： CHANG ALBERT ,  MERGEN MARK FREDERICK ,  O'QUIN II JOHN THOMAS ,  O'QUIN III JOHN CLAUDE ,  ROGERS MARK DOUGLAS

IPC: G06F9/48 ,  G06F12/10 ,  G06F9/46 ,  G06F13/10