We implemented Remote Procedure Call (RPC) library based 
on Memory Based Control Facility (MBCF). MBCF is a principal
comunication system of our massively parallel operationg system(OS)
SSS-CORE[Matsumoto, '94]. Today,implementaion of
RPC is not a hot topic. But MBCF has strong features 
(1)MBCF enables one process to write data directly into another 
process's memory space.
(2)guarantees transaction of data segments. 
(3)is designed to work well with asynchronous data transaction.
These features are useful to implement ``reduced copy'',
``work asynchronously with returning results'',''exactly once execution''
RPC.In this paper,we discuss implimentation technique of Client-Server 
application using MBCF and implement RPC library on SUNRPC4.0 on SSS-CORE.
we compare performance  of RPC on SunOS UDP, SSS-CORE UDP, SSS-CORE MBCF.