Memory Upload and Download Handling  There are two ways to upload data to the DPU:
* Memory Poke (D_MEM_DAT_POKE command), or
* Memory Upload (D_MEM_DAT_UPLD command).
The memory poke command is used when a small (<=Z bytes) of data need to be poked into a DPU memory location.  The Z byte limitation is derived from the Company X command length constraint.