JPS5760435A - Data transfer controlling system - Google Patents
Data transfer controlling systemInfo
- 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
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.
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)
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 |
-
1980
- 1980-09-30 JP JP13519180A patent/JPS5760435A/en active Pending
Cited By (2)
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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