JPS6486258A - Address bus testing system - Google Patents
Address bus testing systemInfo
- Publication number
- JPS6486258A JPS6486258A JP62243465A JP24346587A JPS6486258A JP S6486258 A JPS6486258 A JP S6486258A JP 62243465 A JP62243465 A JP 62243465A JP 24346587 A JP24346587 A JP 24346587A JP S6486258 A JPS6486258 A JP S6486258A
- Authority
- JP
- Japan
- Prior art keywords
- address bus
- circuit
- address
- unit
- comparing
- 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 detect a trouble in which a specific bit is fixed to either 0 or 1 by outputting 0 or 1 to all the bits of an address bus, storing it in them, instructing to set comparing data to either 0 or 1, and comparing the data. CONSTITUTION:At the time of testing the address bus, a central processing unit 1 reads a program for testing the address bus in a storing circuit 2, sets a 0 address to a register R in the unit 1, makes a comparing data signal 30 into 0, and makes gate signals 31 and 34 into 1 through an input and output control device 3. Next, the unit 1 impresses the output of a shift register circuit 4 loaded with an address on an address bus 17 in parallel and the comparing data signal 30 to an exclusive 'or' circuit 5, reads the condition of a result output signal 28 of an FF circuit 7 impressed the output signal, and decides the trouble.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62243465A JPS6486258A (en) | 1987-09-28 | 1987-09-28 | Address bus testing system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62243465A JPS6486258A (en) | 1987-09-28 | 1987-09-28 | Address bus testing system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6486258A true JPS6486258A (en) | 1989-03-30 |
Family
ID=17104293
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62243465A Pending JPS6486258A (en) | 1987-09-28 | 1987-09-28 | Address bus testing system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6486258A (en) |
-
1987
- 1987-09-28 JP JP62243465A patent/JPS6486258A/en active Pending
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR910017300A (en) | Data communication interface and its communication method | |
EP0234038A3 (en) | Apparatus for identifying the lru storage unit in a memory | |
JPS53125738A (en) | Device for reporting status | |
TW360791B (en) | Memory array test circuit and method | |
JPS6486258A (en) | Address bus testing system | |
KR880011656A (en) | Resistor circuit | |
KR970055599A (en) | Transmission data organization | |
JPS5710846A (en) | Information processing equipment | |
JPS573126A (en) | Input and output controlling system | |
JPS5510614A (en) | Controller | |
JPS57150036A (en) | Method and circuit for selection of specific sequence data | |
JPS57132245A (en) | Testing system for arithmetic circuit | |
JPS57135496A (en) | P-rom compensating circuit | |
JPS56101229A (en) | Computer system | |
JPS6470848A (en) | Picture display control system | |
JPS55164930A (en) | Signal fetch unit | |
JPS6473437A (en) | Memory write protection circuit | |
JPS5547522A (en) | Control system of input and output device | |
JPS5457924A (en) | Data input device | |
JPS6464431A (en) | Input and output signal supervising circuit | |
JPS56101247A (en) | Audio output device | |
JPS5464939A (en) | Data transfer device | |
JPS57127996A (en) | Check input data set circuit for shift register constituted logical circuit function testing device | |
JPS55139699A (en) | Error detection system of memory unit | |
JPS6451536A (en) | Output protector |