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:
Mar. 10, 1998
Filed:
Apr. 25, 1996
International Business Machines Corporation, Armonk, NY (US);
Abstract
A memory access control apparatus, which is employed for a computer system in which an expansion memory can be installed in addition to a standard memory and which controls the access to the memory by one or more signal lines, comprises an identification circuit for reading identification data of the installed expansion memory, a determination circuit for determining the optimal output current values for the signal lines based on the identification data; and a memory controller for adjusting the output current values of the signal lines based on the results obtained by the determination means. Even when multiple types of expansion memories (DIMM cards) whose memory capacities and memory chip arrangements are different are installed, the waveforms and the timings for the output signal lines (RAS, CAS, WE, and MA) of the memory controller can be dynamically compensated for.