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:
Oct. 29, 1991
Filed:
Jul. 12, 1985
Shu-Kuang Ho, Carlisle, MA (US);
Gilbert W Agudelo, Malden, MA (US);
Wang Laboratories, Inc., Lowell, MA (US);
Abstract
A controller for transferring data between a plurality of data storage and retrieval devices and a plurality of computer workstations, and which is especially applicable to transferring bit-mapped image data. The controller responds to requests from a plurality of ports on the controller, connected to computers or similar devices, for connection to selected ones of a plurality of channels connected to the data retrieval devices. The connect request is decoded by the controller, and if the requested channel is available, the controller will interconnect the two devices. The controller allows simultaneous access by any of the ports to any of the channels not being used by another port. The device is in modular form so that a single design can be configured to efficiently operate in different applications. The controller is cascadable to allow larger numbers of devices to be connected. Only four serial data lines are necessary for interfacing with each computer and storage device making the installation of the connections relatively easy and economical.