Title:
【発明の名称】デ-タ伝送システム
Document Type and Number:
Japanese Patent JPS6021502
Kind Code:
B2
Abstract:
1530757 Loop systems INTERNATIONAL BUSINESS MACHINES CORP 20 June 1977 [26 July 1976] 25729/77 Heading H4P A unidirectional loop system for passage of data between central processing unit CPU, Fig. 1, and {disc or tape} storage devices 3, information being organized into frames, the loop delay greatly exceeding frame duration in view of the high data rate, is characterized by the algorithms, Figs. 4, 5 determining the inter-relation between particular types of received frame, and the corresponding despatched frame for the loop controller 7, or primary terminal, and the device adaptors, or secondary terminals. In particular, Fig. 4, if the loop controller receives a write request frame from a particular adapter, it responds by replacing that frame with a data filled frame addressed to that adapter, or if it receives a frame full of data from an adapter, it stores that data and replaces the frame with an empty, unassigned one. Each frame comprises bit, and frame synchronizing bits, address bits, and a numer of 8-bit bytes, available for transmission of data, commands, or status in response to such commands; together with further bits, corresponding to a cyclical redundancy code and parity bits for error checking. Further frames are devoted to the establishment or checking of frame and bit sync. Fig. 4 shows the nature of processing and replacement for the loop controller, that for each adapter being disclosed in Fig. 5. Figs. 2 and 3 (not shown) disclose the nature of the data handling, in the loop controller 7 and adapter 19, and that in the serial converters 13, 15, 17 ... respectively. The loop passes information in bipolar differential code, Fig. 8 (not shown) using a pair of parallel paths.
Inventors:
ABURAHAMU EMU GINDEI
DONARUDO JON RANGU
DONARUDO JON RANGU
Application Number:
JP7564377A
Publication Date:
May 28, 1985
Filing Date:
June 27, 1977
Export Citation:
Assignee:
INTAANASHONARU BIJINESU MASHIINZU CORP
International Classes:
G06F13/00; H04L7/08; H04L12/42; (IPC1-7): H04L11/00
Attorney, Agent or Firm:
Koichi Tonmiya