JPS6476246A - System for testing common bus - Google Patents
System for testing common busInfo
- Publication number
- JPS6476246A JPS6476246A JP62234094A JP23409487A JPS6476246A JP S6476246 A JPS6476246 A JP S6476246A JP 62234094 A JP62234094 A JP 62234094A JP 23409487 A JP23409487 A JP 23409487A JP S6476246 A JPS6476246 A JP S6476246A
- Authority
- JP
- Japan
- Prior art keywords
- common bus
- data
- output control
- input
- high order
- 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
Abstract
PURPOSE:To attain the trouble retrieval of a common bus interface part by providing the turning back function of data in respective input and output control devices and executing the DMA transferring of the data with a high order device and all the input and output control devices under the high order device. CONSTITUTION:When a high order device 101 transmits testing data to a common bus 103, an input and output control device 102 receives these testing data by the DMA transferring and the data are turned back to the common bus 103 by a turning back means 104. In the high order device 101, coincidence between the data, which are received from the common bus 103, and transmitting data is detected by a coincidence detecting means 105 and when the coincidence is detected, it is judged that the common bus 103 to reach the input and output control device is normal. By executing such a test in each input and output control device, the retrieval of a trouble spot in the common bus 103 can be executed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62234094A JPS6476246A (en) | 1987-09-18 | 1987-09-18 | System for testing common bus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62234094A JPS6476246A (en) | 1987-09-18 | 1987-09-18 | System for testing common bus |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6476246A true JPS6476246A (en) | 1989-03-22 |
Family
ID=16965524
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62234094A Pending JPS6476246A (en) | 1987-09-18 | 1987-09-18 | System for testing common bus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6476246A (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5345945A (en) * | 1976-10-07 | 1978-04-25 | Toyoda Machine Works Ltd | Data transfer device |
JPS5587215A (en) * | 1978-12-26 | 1980-07-01 | Fujitsu Ltd | Control data confirmation system of data processor |
JPS58149529A (en) * | 1982-03-02 | 1983-09-05 | Hitachi Ltd | Turning-back and diagnosing system of channel status word |
-
1987
- 1987-09-18 JP JP62234094A patent/JPS6476246A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5345945A (en) * | 1976-10-07 | 1978-04-25 | Toyoda Machine Works Ltd | Data transfer device |
JPS5587215A (en) * | 1978-12-26 | 1980-07-01 | Fujitsu Ltd | Control data confirmation system of data processor |
JPS58149529A (en) * | 1982-03-02 | 1983-09-05 | Hitachi Ltd | Turning-back and diagnosing system of channel status word |
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