In the "creating multiprocessor Nios II systems",I have found a problem on mailbox

--- Quote Start ---

I didn't have a look at the software part of the tutorial, but you are free to use the location that you want in the shared memory. Maybe they want to use the first 2k to store some other data...

--- Quote End ---

Hi,thank you for your reply.But I think the first 2k is just used as the shared memory which woul store the message between the 2 processors.What I feel confused is that why they partition the shared memory in this way:

first 2 K :shared memory;

second 1K:mailbox;

third 1K :shared memory.