G - Physics – 06 – F
Patent
G - Physics
06
F
354/231, 354/232
G06F 13/42 (2006.01) G06F 11/10 (2006.01) G06F 13/12 (2006.01)
Patent
CA 1227880
Abstract of the Disclosure An electrical interface system is disclosed. The system provides a set of signals to be used in transferring information between first and second terminals. To transfer information from the first terminal to the second terminal, a WRITE CLOCK, FUNCTION/DATA READY, four CODE, one CODE PARITY, 16 DATA and DATA PARITY signals are provided. To transfer information from a second terminal to the first terminal, a READ CLOCK, STATUS/DATA READY, ERROR, DONE, INDEX/SECTOR MARK, STATUS PARITY, 16 DATA and one DATA PARITY signals are provided. The four CODE signals may be formed to signal any one of a plurality of requested func- tions to the second terminal, while the second terminal may indicate its general status to the first terminal with the ERROR, DONE, READY and MARK signals, each terminal capable of further defining functions or status by formation of words with the data signals. Protocol for transferring information between the terminals is provided, and provides that a predetermined plurality of data parcels be trans- ferred in response to each request for data on consecutive cycles of the WRITE CLOCK or READ CLOCK signals. The system further provides that the process of transferring said pre- determined plurality of parcels is automatically repeated a second predetermined number of times in order that an entire data record be transferred between the terminals in response to a READ or WRITE request. The system further provides for particular sequencing of signals and communication of infor- mation between the terminals using combinations of inter- facing signals.
480352
Cray Research Inc.
Gowling Lafleur Henderson Llp
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