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:
Sep. 06, 1977
Filed:
Jan. 10, 1977
Natalio Kerllenevich, Lexington, MA (US);
Daniel Michael Clemson, Weston, MA (US);
Data General Corporation, Westboro, MA (US);
Abstract
There is disclosed an input/output system, employed within a data processing system that includes a central processing unit (CPU). The CPU includes improved input/output shift register structure of interfacing structure for interfacing with I/O structure. The I/O structure includes improved CPU transceiver and peripheral device transceiver apparatus. The device transceiver interfaces with an improved device controller. In the preferred embodiment of the present invention, the CPU, CPU transceiver, device transceiver, and device controller, all being constructed primarily from MOS technology, are each contained within a respective chip. Further features of the input/output system include capability for placement of multiple transceiver/controllers and their respective peripheral devices at varying distances from the CPU by virtue of novel clock and data transmission means which maintains accurate processing of data regardless of propagation delay, distortion, data skewing, etc., due to varying transmission distances and inherent limitations of MOS, bipolar, and other technology.