**Not mandatory.** Only needed if a VSCP boot-loader algorithm is used.

Request from a node to program a data block that has been uploaded and confirmed. This event has no meaning for any node that is not in boot mode and should be disregarded.

 | Data byte | Description | 
 | :---------: | ----------- | 
 | 0 | MSB of block number. | 
 | 1 | Block number.        | 
 | 2 | Block number.        | 
 | 3 | LSB of block number. | 
