JPS5566015A - Shared line state detection system - Google Patents

Shared line state detection system

Info

Publication number
JPS5566015A
JPS5566015A JP13954578A JP13954578A JPS5566015A JP S5566015 A JPS5566015 A JP S5566015A JP 13954578 A JP13954578 A JP 13954578A JP 13954578 A JP13954578 A JP 13954578A JP S5566015 A JPS5566015 A JP S5566015A
Authority
JP
Japan
Prior art keywords
state
search
lines
search lines
signal line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP13954578A
Other languages
Japanese (ja)
Inventor
Kiyoshi Tsuchiya
Tetsuo Yonezawa
Tsutomu Igarashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP13954578A priority Critical patent/JPS5566015A/en
Publication of JPS5566015A publication Critical patent/JPS5566015A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To make it possible to detect the idle state of a shared signal line and increase or reduce freely the number of processing units by a constitution using a search line.
CONSTITUTION: Use state detecting search lines 5 and 6 are used. In case of the state of a common resource, search command T1a is transmitted from a processing part to input the state of detecting search lines into resister 8. That is, when search lines 5 as well as 6 are "H", the output of NAND gate 9 becomes "L", and output Q' of register 8 becomes "H", and the output of register 8 controls search lines 5 and 6 through inverter 10 and NAND gate 11 so that these lines may be "L" respectively. Consequently, under this state, other state detection control parts 7x of shared signal line 2 can hold the use of signal line 2 because it is detected that search lines 5 and 6 are in Busy state. In case that detection of idle states of search lines 5 and 6 for plural processing units is probalbe, state input command T2a is transmitted.
COPYRIGHT: (C)1980,JPO&Japio
JP13954578A 1978-11-13 1978-11-13 Shared line state detection system Pending JPS5566015A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13954578A JPS5566015A (en) 1978-11-13 1978-11-13 Shared line state detection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13954578A JPS5566015A (en) 1978-11-13 1978-11-13 Shared line state detection system

Publications (1)

Publication Number Publication Date
JPS5566015A true JPS5566015A (en) 1980-05-19

Family

ID=15247753

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13954578A Pending JPS5566015A (en) 1978-11-13 1978-11-13 Shared line state detection system

Country Status (1)

Country Link
JP (1) JPS5566015A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007283375A (en) * 2006-04-19 2007-11-01 Nippon Spindle Mfg Co Ltd Method of squeezing work, and apparatus therefor
JP2008012549A (en) * 2006-07-04 2008-01-24 Nissan Motor Co Ltd Apparatus and method of working fine shape, and sliding member

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5099235A (en) * 1973-12-28 1975-08-06
JPS51113524A (en) * 1975-03-31 1976-10-06 Advantest Corp Data transfer controlling system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5099235A (en) * 1973-12-28 1975-08-06
JPS51113524A (en) * 1975-03-31 1976-10-06 Advantest Corp Data transfer controlling system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007283375A (en) * 2006-04-19 2007-11-01 Nippon Spindle Mfg Co Ltd Method of squeezing work, and apparatus therefor
JP2008012549A (en) * 2006-07-04 2008-01-24 Nissan Motor Co Ltd Apparatus and method of working fine shape, and sliding member

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