A Computer Communication Control Technique for Virtualization of Network Memory Resources and Its Implementation

概要

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This paper presents the attempt we have made in linking two minicomputers, the PDP 11/40 and MELCOM 70/35. The main purpose of the link is to enhance the power of the PDP 11/40 as a stand-alone machine by virtue of the utilization of memory resources of the MELCOM 70/35. The technique we employed was to virtualize memory resources of both minicomputers and to reconstruct new memory hierarchy on the link of them. We considered any kind of hardware level information transfers in a system to be "communication" and developed a processor to control such communication as extensively and uniformly as possible. This processor is called the communication control unit (CCU) in this sense. The CCU constructs virtualized memory resources on a network of heterogeneous computers, creating a new physical view of extended memory resources. The CCU is composed of micro-programmed bit-slice microprocessors with cycle time of 200 ns and high speed memory units. It is equipped with cache memory to increase the throughput of the PDP 11/40 as well as to control various communications. This technique has two potential impacts. One is concerning the software transplantation. The other is concerning the personal computing network in the future.
一般社団法人情報処理学会の論文
1981-02-15