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:
Apr. 04, 1995
Filed:
Jun. 22, 1994
William F Detschel, Saugerties, NY (US);
Darwin W Norton, Jr, Stone Ridge, NY (US);
Richard C Paddock, Red Hook, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Adapters attach the bus or video display of a personal computer or workstation to a high performance parallel interface (HIPPI) channel of a host computer. The HIPPI channel operates at a burst rate of 100 megabytes (MB) per second. The adapter includes an electrical circuit interface to provide compatible signal levels between the HIPPI channel and the bus of the personal computer or workstation. The adapter attaching the bus includes a first-in, first-out (FIFO) buffer that receives data words from the HIPPI channel. Control logic monitors the status of the FIFO buffer and interlocks the operation of the personal computer or workstation bus with the HIPPI channel so that proper data transfer is performed by the FIFO buffer. The adapter attaching the video display includes a pair of buffers operating in a ping-pong fashion to allow data to be written while data is being read. The buffers can be addressed by the personal computer or workstation as if they were internal memory. To allow a plurality of workstations to be connected to a single HIPPI channel, the HIPPI adapter is modified to include a pass through function allowing the devices to be connected in a 'Daisy chain'.