(19)
(11) EP 0 462 708 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
22.04.1992 Bulletin 1992/17

(43) Date of publication A2:
27.12.1991 Bulletin 1991/52

(21) Application number: 91304736.1

(22) Date of filing: 24.05.1991
(51) International Patent Classification (IPC)5: G11C 7/00, G06F 12/02, G09G 1/16
(84) Designated Contracting States:
DE FR GB

(30) Priority: 19.06.1990 US 540546

(71) Applicant: International Business Machines Corporation
Armonk, N.Y. 10504 (US)

(72) Inventors:
  • West, Roderick Michael Peters
    Colchester, Vermont 05446 (US)
  • Williams, Todd
    Westford, VT 05494 (US)

(74) Representative: Burt, Roger James, Dr. 
IBM United Kingdom Limited Intellectual Property Department Hursley Park
Winchester Hampshire SO21 2JN
Winchester Hampshire SO21 2JN (GB)


(56) References cited: : 
   
       


    (54) Video random access memory


    (57) A Video Random Access Memory device wherein full and efficient use of a serial access memory portion provides a simple and efficient means of avoiding Mid-Line Reloads and Real-Time Data Transfers whereby selected parts of two different rows in a random access memory portion are transferred simultaneously to the serial access memory portion via addressable transfer gates under the control of address/control logic.






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