There is a communication channel between IOP and CPU to perform task which come under computer architecture. This channel explains the commands executed by IOP and CPU while performing some programs. The CPU do not executes the instructions but it assigns the task of initiating operations, the instructions are executed by IOP. I/O transfer is instructed by CPU. The IOP asks for CPU through interrupt. This channel starts by CPU, by giving “test IOP path” instruction to IOP and then the communication begins as shown in diagram:
Communication channel between CPU and IOP
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