JPH02146650A - Bus analyzer - Google Patents

Bus analyzer

Info

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
Application number
JP63301686A
Other languages
Japanese (ja)
Inventor
Masahiro Ito
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.)
Yokogawa Electric Corp
Original Assignee
Yokogawa Electric Corp
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 Yokogawa Electric Corp filed Critical Yokogawa Electric Corp
Priority to JP63301686A priority Critical patent/JPH02146650A/en
Publication of JPH02146650A publication Critical patent/JPH02146650A/en
Pending legal-status Critical Current

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
JP63301686A 1988-11-29 1988-11-29 Bus analyzer Pending JPH02146650A (en)

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)

* Cited by examiner, † Cited by third party
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
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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