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The Maintenance Operation Protocol (MOP) is used for utility services such as uploading and downloading system software, remote testing and problem diagnosis. It was a proprietary protocol of Digital Equipment Corporation. MOP frames can be one of the following commands:
| Command | Description |
|---|---|
| Contains memory load data. | |
| Request for memory load segment. | |
| Memory load with transfer address. | |
| Parameter load with transfer address. | |
| Request for assistance with dump operation. | |
| Request for next memory dump segment. | |
| Contains memory dump data. | |
| Acknowledgment of dump completion. | |
| Offer of dump/load/loop assistance. | |
| Request for system or loader program. | |
| Request for boot program. | |
| Request for remote console identification. | |
| Remote console identification information. | |
| Request for communication information counters. | |
| Communication information counters. | |
| Remote console in reserved state. | |
| Release of remote console from reserved state. | |
| Poll of remote console for status. | |
| Response to remote console poll. | |
| Request to loopback enclosed data. | |
| Response to loopback request with data. |
See also
References
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