External Program Loading of Secondary Processors
Original Publication Date: 1983-Oct-01
Included in the Prior Art Database: 2005-Feb-07
In certain contemporary systems, "intelligent" I/O controllers containing integral microprocessors are used as secondary data processing systems to offload certain processing functions from host (mainframe) processors. Such secondary processors may be adapted to receive initial loading of command sets representing secondary programs from an associated host processor, and may store and later execute such programs in response to initiating commands from the host processor. The secondary processor may save up execution status information for one or more such programs and transfer aggregate status to the host via single interruption. In one presently known system, the vehicle for initiating the loading of such secondary programs is a device control block vector (DCB) specifically designated as a loading operator or "load DCB".