JPS5760436A - Data transfer control system - Google Patents

Data transfer control system

Info

Publication number
JPS5760436A
JPS5760436A JP13519280A JP13519280A JPS5760436A JP S5760436 A JPS5760436 A JP S5760436A JP 13519280 A JP13519280 A JP 13519280A JP 13519280 A JP13519280 A JP 13519280A JP S5760436 A JPS5760436 A JP S5760436A
Authority
JP
Japan
Prior art keywords
data
bus
inputted
signal
controlling circuit
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
JP13519280A
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 JP13519280A priority Critical patent/JPS5760436A/en
Publication of JPS5760436A publication Critical patent/JPS5760436A/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 increase a data transfer speed, by starting an input operation when a data buffer becomes empty, in case a data is sent out to a bus having a small capacity from a bus having a large capacity. CONSTITUTION:When a transfer on a system bus 2 is permitted, the second controlling circuit 11 outputs a signal 14 for informing it to the third controlling circuit 12, receives a signal 15 for informing that a data is on the system bus 2, from the controlling circuit 12, and decides data buffers 8, 9 to which a data is to be inputted, by said signal, and the data is inputted to said buffers. Also, when the data is sent out to a local bus 5 and a data is gone, its empty data buffer 8 or 9 is selected, and a data is inputted from the system bus 2. Accordingly, a data is freely transferred onto the local bus 5 from the other data buffer 8 or 9.
JP13519280A 1980-09-30 1980-09-30 Data transfer control system Pending JPS5760436A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13519280A JPS5760436A (en) 1980-09-30 1980-09-30 Data transfer control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13519280A JPS5760436A (en) 1980-09-30 1980-09-30 Data transfer control system

Publications (1)

Publication Number Publication Date
JPS5760436A true JPS5760436A (en) 1982-04-12

Family

ID=15145984

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13519280A Pending JPS5760436A (en) 1980-09-30 1980-09-30 Data transfer control system

Country Status (1)

Country Link
JP (1) JPS5760436A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59208094A (en) * 1983-05-13 1984-11-26 Mitsubishi Chem Ind Ltd Product having bronze-like specular surface

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59208094A (en) * 1983-05-13 1984-11-26 Mitsubishi Chem Ind Ltd Product having bronze-like specular surface
JPH0443992B2 (en) * 1983-05-13 1992-07-20 Mitsubishi Chem Ind

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