Accession Number : ADD011968

Title :   Interactive Communication Channel.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Chan,Robert H ; Mann,Martin R ; Ciarrocchi,John A

Report Date : 08 Oct 1985

Pagination or Media Count : 30

Abstract : This patent discusses an interactive communications channel (ICC) for providing a digital computer with high-performance multi-channel interfaces. Sixteen full duplex channels can be serviced in the ICC with the sequence or scan pattern being programmable and dependent upon the number of channels and their speed. A channel buffer system is used for line interface, and character exchange. The channel buffer system is on a byte basis. The ICC performs frame start and frame end functions, bit stripping and bit stuffing. Data is stored in a memory in block format (256 bytes maximum) by a program control and the ICC maintains byte address information and a block byte count. Data exchange with a memory is made by cycle steals. Error detection is also provided for using a cyclic redundnacy check technique.

Descriptors :   *PATENTS, *DUPLEXERS, *DIGITAL SYSTEMS, *COMMUNICATION AND RADIO SYSTEMS, ERROR CORRECTION CODES, MEMORY DEVICES, ELECTRONIC SCANNERS, CODERS, INTERACTIONS, CHANNELS, DIGITAL COMPUTERS, BYTE FUNCTIONAL MODULES, BUFFERS, MULTICHANNEL

Subject Categories : Computer Hardware
      Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE