JPH02146650A - Bus analyzer - Google Patents
Bus analyzerInfo
- Publication number
- JPH02146650A JPH02146650A JP63301686A JP30168688A JPH02146650A JP H02146650 A JPH02146650 A JP H02146650A JP 63301686 A JP63301686 A JP 63301686A JP 30168688 A JP30168688 A JP 30168688A JP H02146650 A JPH02146650 A JP H02146650A
- Authority
- JP
- Japan
- Prior art keywords
- address
- present
- memory
- data
- transfer
- 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 a simple and compact constitution of a bus analyzer by monitoring the address value of a transfer cycle, setting a corresponding bit when an address equal to the preceding one or an address following the preceding one is decided and storing the data on the transfer cycle.
CONSTITUTION: The present data is stored in a memory 6 together with the present address when the present transfer address is different from the preceding transfer address and the value produced by an internal adder 4. When the present address is coincident with the preceding address, the same address bit is set and the present data is stored in the memory 6. While the next address bit is set and the present data is stored in the memory 6 when the present address is coincident with the value produced by the adder 4 contained in a bus analyzer. Thus it is not required to store the address data on all transfer cycles into the memory 6. As a result, the memory area can be reduced and a simple and compact bus analyzer is obtained.
COPYRIGHT: (C)1990,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63301686A JPH02146650A (en) | 1988-11-29 | 1988-11-29 | Bus analyzer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63301686A JPH02146650A (en) | 1988-11-29 | 1988-11-29 | Bus analyzer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH02146650A true JPH02146650A (en) | 1990-06-05 |
Family
ID=17899920
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63301686A Pending JPH02146650A (en) | 1988-11-29 | 1988-11-29 | Bus analyzer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH02146650A (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6286442A (en) * | 1985-10-14 | 1987-04-20 | Hitachi Ltd | Data processor |
JPS62109140A (en) * | 1985-11-08 | 1987-05-20 | Nec Corp | Tracing circuit for program processor |
JPS63123140A (en) * | 1986-11-12 | 1988-05-26 | Nec Corp | History information storage device |
-
1988
- 1988-11-29 JP JP63301686A patent/JPH02146650A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6286442A (en) * | 1985-10-14 | 1987-04-20 | Hitachi Ltd | Data processor |
JPS62109140A (en) * | 1985-11-08 | 1987-05-20 | Nec Corp | Tracing circuit for program processor |
JPS63123140A (en) * | 1986-11-12 | 1988-05-26 | Nec Corp | History information storage device |
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