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31. 发明专利

JPH04152444A INSTRUCTION RETRY METHOD 失效
公开(公告)号：JPH04152444A
公开(公告)日：1992-05-26
申请号：JP27822690
申请日：1990-10-17
申请人： FUJITSU LTD
发明人： MIURA TAKESHI , KANDA MAKOTO , TAKIZAWA HIROSHI
IPC分类号： G06F9/32 , G06F13/00
摘要： PURPOSE:To attain a nonstop operation despite the occurrence of a temporary fault by reading an instruction counter of a processor and executing an instruction again after returning the read instruction counter to an instruction address. CONSTITUTION:When the abnormality occurs on a bus and an interruption signal is inputted, this interruption signal is inputted to an NMI terminal of a processor 1, and at the same time inverted by a NOT circuit 14 to inhibit the output of an AND circuit 13. The processor 1 decodes the address transmitted then by a decoder 10 to send this decoded address to a RAM 9 and also outputs a read instruction to the RAM 9. Under such conditions, an address fetch part 11 is started to fetch an instruction fetch address received from a data terminal of the RAM 9 at occurrence of the abnormality. Then the processor 1 sets up the instruction fetch address obtained at occurrence of the abnormality to an instruction counter and performs a retry.

32. 发明专利

JPH0364131A RECEIVER FAULT DECISION CIRCUIT 失效
公开(公告)号：JPH0364131A
公开(公告)日：1991-03-19
申请号：JP19936389
申请日：1989-08-02
申请人： FUJITSU LTD
发明人： KANDA MAKOTO , TAKIZAWA HIROSHI , OGUCHI AKEMI
IPC分类号： H04B1/74 , H04Q9/00
摘要： PURPOSE:To prevent fault mis-decision at crosstalk of weak radio wave or at squelch consecutive ON fault by detecting the presence of reception after lapse of a specified time, deciding a receiver having no reception as a faulty receiver, and monitoring the time of presence of reception so as to decide a receiver whose state of presence of reception is consecutive longer than the specified time as a faulty receiver. CONSTITUTION:A 1st timer circuit 1, an exclusive OR circuit 5, an AND circuit 6 and a 1st output means 15 are provide and when the state of presence of reception of 2 receivers differs after a prescribed time elapses after a master station transmitter is started, a receiver in the state of no reception is decided to be faulty. Moreover, an OR circuit 9, a 2nd timer circuit 2 and a 2nd output means 16 are provided to monitor a time when each receiver is in the state of presence of reception and when there is a receiver when the time is larger than the specified time, the receiver is decided to be faulty. Thus, fault mis- decision due to a weak crosstalk wave is evaded and the fault of squelch consecutive ON is detected.

33. 发明专利

JPH0223451A DMA TRANSFER SYSTEM 失效
公开(公告)号：JPH0223451A
公开(公告)日：1990-01-25
申请号：JP17414188
申请日：1988-07-13
申请人： FUJITSU LTD
发明人： SUZUKI ATSUSHI , OYA NOBUMASA , TAKIZAWA HIROSHI , YAMANA KENJI , TANIGAWA KIYOZUMI , HIROSE RYOSUKE , YAMAMOTO TAKAHIRO
IPC分类号： G06F15/16 , G06F13/00 , G06F13/28 , G06F13/36
摘要： PURPOSE:To prevent the effect of CPU runaway on the other part by separating the buses of a main CPU and a sub-CPU, and transferring data with repeating an I/O buffer and without sharing the bus. CONSTITUTION:Presently, when the data are transferred from a memory 4b to a memory 3, a sub CPU 2b writes the command of a transfer start through a bus B2b to an I/O buffer 6b. The command is notified through a bus B1 to a main CPU 1. Further, the CPU 2b instructs address information for a DMA controller 5b, activates the controller 5b, and the controller 5b once writes the data of the memory 4b through the bus B2b to a buffer 7b according to the address information. The controller 5b transfers the data of the buffer 7b through the bus B1 to the memory 3. Thus, by repeating the buffer and without sharing the bus, the effect of the CPU runaway on the other part is prevented.

34. 发明专利

JPH023235B2 失效
公开(公告)号：JPH023235B2
公开(公告)日：1990-01-22
申请号：JP14141181
申请日：1981-09-08
申请人： FUJITSU LTD
发明人： KAKEHI HAJIME , HOSHINO KEISUKE , TAKIZAWA HIROSHI , IKEDA KIMIHIRO
IPC分类号： H04L7/00 , G06F17/40 , G08C15/06 , H04Q9/00

35. 发明专利

JPH01298441A EXCLUSION CONTROL SYSTEM FOR MEMORY ACCESS 失效
公开(公告)号：JPH01298441A
公开(公告)日：1989-12-01
申请号：JP13082388
申请日：1988-05-27
申请人： FUJITSU LTD
发明人： YAMAMOTO TAKAHIRO , OYA NOBUMASA , TAKIZAWA HIROSHI , YAMANA KENJI , TANIGAWA KIYOZUMI , HIROSE RYOSUKE , SUZUKI ATSUSHI
IPC分类号： G06F9/46 , G06F9/52
摘要： PURPOSE:To decrease the overhead of a CPU and to improve a memory use efficiency by providing a counter circuit and accessing a memory area corresponding to the counted value. CONSTITUTION:A memory 10 is divided into areas 1-(n) and by a counter circuit 12, a counting action is executed for an access for respective dividing areas 1-(n). Out of the areas 1-(n), areas 1, 2, 3... or (n) corresponding to the counted value of the counter circuit 12 are accessed. Consequently, since the processing necessary for the pointer value change of a pointer for designating an access area is replaced to the action of a counter circuit due to the hardware, the processing and the interruption mask are made unnecessary. Thus, the overhead of the exclusion control can be decreased and while the processing speed of a system is increased, the memory can be efficiently used.

36. 发明专利

JPH01169628A DYNAMIC REPLACING SYSTEM FOR ROM SOFTWARE 失效
公开(公告)号：JPH01169628A
公开(公告)日：1989-07-04
申请号：JP32882887
申请日：1987-12-25
申请人： FUJITSU LTD
发明人： YAMAMOTO TAKAHIRO , OYA NOBUMASA , TAKIZAWA HIROSHI , YAMANA KENJI , TANIGAWA KIYOZUMI , HIROSE RYOSUKE , SUZUKI ATSUSHI
IPC分类号： G06F9/06
摘要： PURPOSE:To exchange a ROM with a simple constitution by invalidating an original ROM and validating a new ROM when a ROM selecting part is driven. CONSTITUTION:When the stop of an instructed task is discriminated, a pertient task stoppage deciding part 102 outputs a control signal to a ROM selecting part 11 and supplies the control signal to a switching completion display generating part 104. The ROM selecting part 11, when the control signal is received, switches the output condition of a selecting line 110. Then, a ROM 1 and a ROM 2 are driven in the condition opposite to the one until then, the ROM 1 is invalidated, the ROM 2 is validated and the action of the system after that is controlled by the software supplied from the ROM 2. The display to display from the switching completion display generating part 104 of a processing part 10 that the switching is executed is outputted to a display part 14, the display is watched and an operator removes an old ROM 1.

37. 发明专利

JPS62264399A FEEDER SYSTEM 失效
公开(公告)号：JPS62264399A
公开(公告)日：1987-11-17
申请号：JP10812986
申请日：1986-05-12
申请人： FUJITSU LTD
发明人： TAKIZAWA HIROSHI
IPC分类号： G06F1/28 , G06F1/00 , G06F1/26 , G08C23/00 , G08C23/04 , H02J7/00 , H02J13/00

38. 发明专利

JPS60200643A TELEMETER TERMINAL EQUIPMENT 失效
公开(公告)号：JPS60200643A
公开(公告)日：1985-10-11
申请号：JP5763184
申请日：1984-03-26
申请人： FUJITSU LTD
发明人： NOZAWA KUNIO , TAKIZAWA HIROSHI
IPC分类号： G08C15/06 , H04L12/40
摘要： PURPOSE:To shorten a time required for one round period where the transmission of measuring data to a master station from plural slave stations ends by detecting the number of slave stations which have ended the transmission of the data, and also collating its number with a time order of a data transmission determined in advance to the slave station, in a telemeter system connected by a multi-drop circuit. CONSTITUTION:First of all, 1, 2...(n) are stored in a memory 10, respectively, as a time rank of a data transmission determined in advance to each at every slave station 21, 22...2n. Also, when starting a transmission of a measuring data, and whenever the transmission of the measuring data by plural slave stations 21, 22...2n makes the round, a master station 1 transmits a control signal C. A control signal detecting part 12 detects this control signal C and generates a reset signal, and a count value of a counter 9 is reset to ''1''. As a result, in the slave station 21, the count value of the counter 9 coincides with the storage contents of the memory 10, therefore, a comparing part 11 generates a coincidence signal, and by a parallel/series converting part 6 and a modulating part 7, a measuring data B1 is provided to a multi-drop circuit and transmitted to the master station 1. In such a way, when the transmission of the measuring data of the slave station 21 is ended, the count value of the counter 9 goes to ''2'' and the transmission is repeated.

39. 发明专利

JPS6026472B2 失效
公开(公告)号：JPS6026472B2
公开(公告)日：1985-06-24
申请号：JP7002080
申请日：1980-05-28
申请人： FUJITSU LTD
发明人： KAKEHI HAJIME , HOSHINO KEISUKE , TAKIZAWA HIROSHI , KONO YOSHIAKI , HACHITANI ATSUAKI
IPC分类号： G01V1/00 , G01V1/30

40. 发明专利

JPS6016755A TALKING SYSTEM IN INFORMATION TRANSMISSION SYSTEM 失效
公开(公告)号：JPS6016755A
公开(公告)日：1985-01-28
申请号：JP12451983
申请日：1983-07-08
申请人： FUJITSU LTD
发明人： TAKIZAWA HIROSHI
IPC分类号： H04M11/00 , H04M11/06
摘要： PURPOSE:To transmit call only to a prescribed slave station requiring the call by arranging a call control signal in a data, in a system transmitting the data and call. CONSTITUTION:In transmitting the data and call to a slave station 24-1 from a master station 23, the call control signal is arranged in the data in the data signal transmitted from a data transmitter 22 of the master station 23. An address SA of the slave station and the call control signal S are detected from the data signal by a detector 19 of a data transmitter 18 via the paths of HPF7-HYB8- transmission line 3 and HYB9 of slave station 24-1 - HPF11. This detected signal drives a switch 16 of a talking device 14 via a driving circuit 11 to turn off the termination resistor of the talking device 14 and also connects the talking circuit of a handset 15 to receive a talking command from the master station 23. Further, the call from the slave station 24-1 to the master station 23 is transmitted conventionally by the handset 15.

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