JPS57164347A - Undefined instruction detector for one chip microcomputer - Google Patents

Undefined instruction detector for one chip microcomputer

Info

Publication number
JPS57164347A
JPS57164347A JP56048619A JP4861981A JPS57164347A JP S57164347 A JPS57164347 A JP S57164347A JP 56048619 A JP56048619 A JP 56048619A JP 4861981 A JP4861981 A JP 4861981A JP S57164347 A JPS57164347 A JP S57164347A
Authority
JP
Japan
Prior art keywords
instruction code
data
address
stored
undefined
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
JP56048619A
Other languages
Japanese (ja)
Inventor
Kazuo Onda
Yoshitaka Tsuchiya
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 JP56048619A priority Critical patent/JPS57164347A/en
Publication of JPS57164347A publication Critical patent/JPS57164347A/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
    • G06F11/36—Preventing errors by testing or debugging software

Landscapes

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

Abstract

PURPOSE:To surely perform program debug after assembling, by fetching a data fetched to a CPU to the 2nd memory at the same time through the address designation from a CPU and resetting the CPU when an undefined instruction code is detected. CONSTITUTION:In debugging if a program after assembling is normal on an actual machine, first an address corresponding to an input instruction code is picked up when the instruction code is inputted to a CPU1 from a console or the like, the address is applied to a memory 13 through an address bus, and a read instruction code is fetched to the CPU1 via a data bus 8 and stored in a discrimination circuit 14. The circuit 14 discriminates if the stored data is a defined instruction code and it outputs 0 or 1, and the code is an undefined instruction code, an FF20 is set and the undefined data is stored in an FF18 and the address is stored in an FF16. The output of a NAND gate NAND2 resets the CPU1 and monitors the data.
JP56048619A 1981-03-31 1981-03-31 Undefined instruction detector for one chip microcomputer Pending JPS57164347A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56048619A JPS57164347A (en) 1981-03-31 1981-03-31 Undefined instruction detector for one chip microcomputer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56048619A JPS57164347A (en) 1981-03-31 1981-03-31 Undefined instruction detector for one chip microcomputer

Publications (1)

Publication Number Publication Date
JPS57164347A true JPS57164347A (en) 1982-10-08

Family

ID=12808418

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56048619A Pending JPS57164347A (en) 1981-03-31 1981-03-31 Undefined instruction detector for one chip microcomputer

Country Status (1)

Country Link
JP (1) JPS57164347A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59123950A (en) * 1982-12-29 1984-07-17 Matsushita Electric Ind Co Ltd Program controller
JPS60181937A (en) * 1984-02-29 1985-09-17 Fujitsu Ltd Checking circuit of instruction code
JPS60207935A (en) * 1984-03-31 1985-10-19 Toshiba Corp Detecting system of illegal instruction
JPS62281005A (en) * 1986-05-30 1987-12-05 Fuji Electric Co Ltd Programming system for programmable controller
JP4839369B2 (en) * 2005-06-13 2011-12-21 ロベルト ボッシュ ゲゼルシャフト ミト ベシュレンクテル ハフツング Drive belt for continuously variable transmission and method for producing transverse element for such drive belt

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4833540A (en) * 1971-08-31 1973-05-11
JPS55110348A (en) * 1979-02-16 1980-08-25 Hitachi Ltd Microprocessor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4833540A (en) * 1971-08-31 1973-05-11
JPS55110348A (en) * 1979-02-16 1980-08-25 Hitachi Ltd Microprocessor

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59123950A (en) * 1982-12-29 1984-07-17 Matsushita Electric Ind Co Ltd Program controller
JPH0128968B2 (en) * 1982-12-29 1989-06-07 Matsushita Electric Ind Co Ltd
JPS60181937A (en) * 1984-02-29 1985-09-17 Fujitsu Ltd Checking circuit of instruction code
JPS60207935A (en) * 1984-03-31 1985-10-19 Toshiba Corp Detecting system of illegal instruction
JPS62281005A (en) * 1986-05-30 1987-12-05 Fuji Electric Co Ltd Programming system for programmable controller
JP4839369B2 (en) * 2005-06-13 2011-12-21 ロベルト ボッシュ ゲゼルシャフト ミト ベシュレンクテル ハフツング Drive belt for continuously variable transmission and method for producing transverse element for such drive belt

Similar Documents

Publication Publication Date Title
KR970012152A (en) DATA PROCESSING SYSTEM AND METHOD FOR PERFORMING DEBUG FUNCTION
US4349872A (en) Interrupt control system
EP0166431A2 (en) An information processing apparatus having an instruction prefetch circuit
JPS57164347A (en) Undefined instruction detector for one chip microcomputer
US4763248A (en) Microcomputer with a detecting function of a memory access error
EP0299075A4 (en) Processing unit having at least one coprocessor.
JPS5663652A (en) Information processing unit
EP0525672A2 (en) Microprocessor with program tracing
JPS6111853A (en) Information processor
JPS6454547A (en) Information processor with program trace function
JP2871429B2 (en) Processor with runaway monitoring function
JPS6118045A (en) Detecting system of program runaway
JP3214413B2 (en) emulator
JPS62109140A (en) Tracing circuit for program processor
JPS57203162A (en) One-chip microcomputer
JPS59229651A (en) Device for developing system
JPS60179847A (en) Matching check system between real array and virtual array
JPS6051135B2 (en) Instruction word verification method by adding parity bits
JPH03296146A (en) Back-up device for program development
JPH04284544A (en) Micro-controller
JPS55166748A (en) Detection system for computer program runaway
JPH0665941U (en) Program operating device
JPS61196337A (en) Detecting system for unused area access of memory
Ramirez Analysis of a system development simulation based on a parallel process concept.
JPH0679278B2 (en) Microcomputer development equipment