JPS57203151A - History storage system of logical device - Google Patents

History storage system of logical device

Info

Publication number
JPS57203151A
JPS57203151A JP56089171A JP8917181A JPS57203151A JP S57203151 A JPS57203151 A JP S57203151A JP 56089171 A JP56089171 A JP 56089171A JP 8917181 A JP8917181 A JP 8917181A JP S57203151 A JPS57203151 A JP S57203151A
Authority
JP
Japan
Prior art keywords
instruction
address
instruction code
stored
signal
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
JP56089171A
Other languages
Japanese (ja)
Inventor
Hideo Tamura
Katsuyuki Iwata
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP56089171A priority Critical patent/JPS57203151A/en
Publication of JPS57203151A publication Critical patent/JPS57203151A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/30—Monitoring
    • G06F11/34—Recording or statistical evaluation of computer activity, e.g. of down time, of input/output operation ; Recording or statistical evaluation of user activity, e.g. usability assessment

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Debugging And Monitoring (AREA)

Abstract

PURPOSE:To reduce erroneous processing due to a difference between an instruction address and an instruction code by storing a couple of the instruction address and instruction code in adjacent addresses by a history storage system which achieves circulating storage. CONSTITUTION:An instruction of a logical device 1 has one instruction cycle Lop consisting normally of several machine cycles i0-i4, so when some instruction is executed, an instruction address signal is selected and sent out in the starting machine cycle i0, and is stored in the address #n of a storage device 7. In the next machine cycle i1, an instruction code signal 12 is selected and stored in the address #n+1. Thus, a couple of the instruction address signal 11 and instruction code signal 12 having a correlation with respect to history information are stored in adjacent addresses of the storage circuit 7, and consequently pieces of analysis information are obtained from invariably adjacent addresses during an analysis of a fault such as malfunction, thereby reducing erroneous processing whose cause is unclear due to a difference between the instruction address and instruction code.
JP56089171A 1981-06-10 1981-06-10 History storage system of logical device Pending JPS57203151A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56089171A JPS57203151A (en) 1981-06-10 1981-06-10 History storage system of logical device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56089171A JPS57203151A (en) 1981-06-10 1981-06-10 History storage system of logical device

Publications (1)

Publication Number Publication Date
JPS57203151A true JPS57203151A (en) 1982-12-13

Family

ID=13963340

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56089171A Pending JPS57203151A (en) 1981-06-10 1981-06-10 History storage system of logical device

Country Status (1)

Country Link
JP (1) JPS57203151A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61168055A (en) * 1985-01-22 1986-07-29 Nec Corp Information processor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61168055A (en) * 1985-01-22 1986-07-29 Nec Corp Information processor

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