G - Physics – 06 – F
Patent
G - Physics
06
F
340/84
G06F 15/16 (2006.01) B65D 77/30 (2006.01) B65D 85/72 (2006.01)
Patent
CA 1118863
DISTRIBUTED PRIORITY RESOLUTION SYSTEM ABSTRACT OF THE DISCLOSURE Multiple stations exchange information without central supervision. Stations requiring a cycle of access time on a shared time-divided bus participate in a cyclic access resolution process. The station having highest priority for a next bus cycle indicates its precedence to the other stations, and assumes exclu- sive use of the bus in the next cycle. The bus may comprise separate sections for data and response com- munications. Separate access resolution processes are conducted relative to each section. After gaining ac- cess to the bus for one cycle of data transfer a sta- tion becomes ineligible to compete for access to the data section until it receives an associated response. Accordingly receiving stations may control both the rate of data transmittal and the rate of access com- petition activity at associated origin stations. The data and response communications may include address information for enabling stations to intercommunicate directly in pairs. Data processing stations subject to multi-level interruption may present control sig- nals designating acceptable interruption priority levels. Other stations seeking to interrupt such pro- cessing stations are eligible to compete for access to the bus only if assigned interruption priorities are at designated levels. MA9-77-022
315393
International Business Machines Corporation
Na
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