Appeal No. 1998-2093
Application No. 08/303,809
column 5, lines 53-56 of Yamaoka for disclosure of “a computer readable program code
means for facilitating communication to the provider computer that the consumer computer
is ready to extract data from the mapped portion.” Column 5, lines 53-56 of the reference
falls within Yamaoka’s “Summary of the Operation,” described at column 4, line 28 through
column 5, line 63.
The summary provides a general overview of the system shown in Figure 1, which
the reference later describes in depth. A send program, by means of the send operating
system (OS), requests an allocation of memory in memory 50 within shared memory
device 20. Through shared memory device 20, the send OS informs the receive OS of the
leading address and size of a communication buffer allocated in memory 50. The send
OS sends a communication ID having "1" set in the bit position corresponding to the
receive program in the receive OS.
The instructions for sending and receiving a communication ID are distinguished
from the instructions from writing/reading data into/from the memory 50. The above-noted
section of column 5, lines 53-56 refers to the communication ID temporarily stored in
communication ID register 43. If a bit is set for a receive program, hold circuit 40
generates an interrupt request to the corresponding receive subsystem. Upon receiving
the interrupt request, the receive OS issues a receive instruction to the shared memory
device 20 to read out the value of the communication ID register 43. By this process the
receive OS can inform the receive program that data will be transferred via memory 50.
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