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:
May. 22, 1984
Filed:
Sep. 23, 1981
Joel R Oberman, Somerville, NJ (US);
RCA Corporation, New York, NY (US);
Abstract
A data processor system having a total memory capacity, an integrated circuit chip having thereon a central processing unit (CPU), a ROM, a RAM, a first decoder responsive to addresses supplied thereto for determining the location of the RAM in the total memory capacity, and logic for disabling the ROM from the CPU and for relocating the RAM in the total memory capacity. Also provided are a generator for generating a first control signal having first and second states, first gating logic responsive to the first state of the control signal to disable the ROM and to disconnect the output of the first decoder from the RAM. Further provided is an adjustable second decoder positioned externally of the chip and responsive to addresses supplied thereto from the CPU to generate an output signal defining a selectable location of the RAM in the total memory capacity, and second gating logic responsive to the first state of the control signal to connect the output signal of the adjustable second decoder to the RAM to thereby define the selectable location of the RAM in the total memory capacity.