PURPOSE: To take a basic procedure terminal device which is different from each kind of terminal devices part in a network easily by allowing the network to relay all signals corresponded among terminals connected to this system in the unit of frames having a short fixed length when the terminals make communication mutually.
CONSTITUTION: A frame processing section 3 sections all signals from a subscriber (SUB: terminal device or host computer concretely) into a fixed length, adds a header to each and trasmits each to an opposite station ST as a frame. Further, the header part is eliminated from the frame transmitted from the opposite station and outputs the result to the subscriber SUB without intermission. The frame processing section of each station, after the internal initialization is finished, starts a DMA for the frame reception from each subscriber and the loop. When the signal having a designated length is received, the DMA end interruption is generated. The nixt reception buffer address and data length are set in the program started by the DMA interruption and the DMA is restarted.
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| JPH0487438 | ELECTRONIC DEVICE |
MATSUI SUSUMU
NAKASE HIROMU
HARAKAWA TAKESHI
