Successful Channel Store Advance Mechanism
Original Publication Date: 1981-Jun-01
Included in the Prior Art Database: 2005-Feb-11
In contemporary large-scale data processing systems (e.g., IBM System/ Models 168 and 3033) communications from a bus control network associated with system main storage to the I/O channels of the system are carried over a parallel bus shared by a plurality of channels (up to 16 channels in the 3033 systems). This bus is operated presently in response to both Fetch (storage output) requests and Store (storage input) requests originated by the channels. In response to Fetch requests, multiple bytes of data (up to 8 bytes in the 3033 systems) are extracted from main storage and transferred in parallel via the bus to a designated one of the sharing channels.