(19)

(11)

EP 0 418 315 A1

(12)

(43) Date of publication: 27.03.1991 Bulletin 1991/13 (21) Application number: 89907215.0 (22) Date of filing: 12.06.1989

(51) International Patent Classification (IPC):  G11C 11/ 406( . ) G11C 11/ 4074( . ) (86) International application number: PCT/GB1989/000651 (87) International publication number: WO 1989/012303 (14.12.1989 Gazette 1989/29)

(84) Designated Contracting States: DE GB (30) Priority: 10.06.1988 GB 19880013795 (71) Applicant: CAMBRIDGE COMPUTER LIMITED Cambridge CB2 1UE (GB)	(72) Inventors: SINCLAIR, Clive, Miles 10 Bridge Street Cambridge CB2 1UE (GB) WESTWOOD, James 10 Bridge Street Cambridge CB2 1UE (GB) WRIGHT, David 10 Bridge Street Cambridge CN2 1UE (GB) (74) Representative: Abnett, Richard Charles, et al  REDDIE & GROSE 16 Theobalds Road London WC1X 8PL London WC1X 8PL (GB)