JPS5760435A - Data transfer controlling system - Google Patents

Data transfer controlling system

Info

Publication number
JPS5760435A
JPS5760435A JP13519180A JP13519180A JPS5760435A JP S5760435 A JPS5760435 A JP S5760435A JP 13519180 A JP13519180 A JP 13519180A JP 13519180 A JP13519180 A JP 13519180A JP S5760435 A JPS5760435 A JP S5760435A
Authority
JP
Japan
Prior art keywords
data
buffers
transfer
local bus
held
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
JP13519180A
Other languages
Japanese (ja)
Inventor
Nobuhiko Yamagami
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP13519180A priority Critical patent/JPS5760435A/en
Publication of JPS5760435A publication Critical patent/JPS5760435A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/40—Bus structure
    • G06F13/4004—Coupling between buses
    • G06F13/4027—Coupling between buses using bus bridges

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Information Transfer Systems (AREA)

Abstract

PURPOSE:To realize an optimum data transfer, by controlling a data buffer properly, in a transfer system of a data which is sent out to a local bus from a system bus. CONSTITUTION:When a data is sent to a local bus 5 from a system bus 2, if no data is held in data buffers 8, 9, a transfer request signal 6 is made active by the input/output device after data have been held in the data buffers 8, 9, and a signal 15 showing absence of data to be transferred is made inactive. As a result, a transfer end signal 7 is made active and outputted, and the data of the data buffers 8, 9 are outputted to the local bus. If a data transfer is requested when data are held in the data buffers 8, 9, the buffers 8, 9 are controlled immediately, the data are sent out to the local bus, and the signal 15 showing the exhausting of data in the buffers 8, 9 is sent out.
JP13519180A 1980-09-30 1980-09-30 Data transfer controlling system Pending JPS5760435A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13519180A JPS5760435A (en) 1980-09-30 1980-09-30 Data transfer controlling system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13519180A JPS5760435A (en) 1980-09-30 1980-09-30 Data transfer controlling system

Publications (1)

Publication Number Publication Date
JPS5760435A true JPS5760435A (en) 1982-04-12

Family

ID=15145960

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13519180A Pending JPS5760435A (en) 1980-09-30 1980-09-30 Data transfer controlling system

Country Status (1)

Country Link
JP (1) JPS5760435A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60114589A (en) * 1983-11-02 1985-06-21 デグツサ・アクチエンゲゼルシヤフト Alkaline cyanide bath for electrodepositing original or lustrous copper tin alloy coating
JPS6439394A (en) * 1987-07-14 1989-02-09 Bayer Ag Foaming preventing additive to acidic solution

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60114589A (en) * 1983-11-02 1985-06-21 デグツサ・アクチエンゲゼルシヤフト Alkaline cyanide bath for electrodepositing original or lustrous copper tin alloy coating
JPS6439394A (en) * 1987-07-14 1989-02-09 Bayer Ag Foaming preventing additive to acidic solution

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