The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 25, 1996
Filed:
Jul. 28, 1994
Yutaka Wakasu, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
An image memory control device is disclosed by which high speed reading processing can be performed without causing a CPU of a computer to have a waiting time and without expanding the system scale. When the CPU tries to perform read access to an image memory, a CPU read mode signal is changed over and a first-in first-out memory controller delivers a read access request to a memory access controller irrespective of presence or absence of read access, and data read in from the image memory are stored into a FIFO memory under the control of the memory controller. Upon read accessing from the computer, the data are transferred from the first-in first-out memory, which assures higher speed operation. Where writing of video data and read/write access of the computer to the image memory are performed by a same system, the FIFO memory is used as a common buffer to them in a time dividing condition by changing over between them.