=> R0 = buffer's flag word
R1 = size of buffer to be created
R2 = preferred handle for the buffer, -1 to get the buffer manager to generate one
<= R0 = buffer handle
This claims an area of the RMA and registers it as a buffer. It can at most hold R1-1 bytes.
If R2 <>-1, the given number is checked for uniqueness, if it already exists, a new one is generated.
Note that you do not need any complicated calculations to write data into the buffer - it's a simply a block of memory. Get the address with Buffer_GetInfo and write to the buffer.
See PRM 4, page 86.
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