IT1245221B - PROCESSING SYSTEM - Google Patents

PROCESSING SYSTEM

Info

Publication number
IT1245221B
IT1245221B ITMI910669A ITMI910669A IT1245221B IT 1245221 B IT1245221 B IT 1245221B IT MI910669 A ITMI910669 A IT MI910669A IT MI910669 A ITMI910669 A IT MI910669A IT 1245221 B IT1245221 B IT 1245221B
Authority
IT
Italy
Prior art keywords
improved functions
cpu
program instructions
processing system
rom cartridge
Prior art date
Application number
ITMI910669A
Other languages
Italian (it)
Inventor
Stephen David Gane
Original Assignee
Amstrad Plc
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 Amstrad Plc filed Critical Amstrad Plc
Publication of ITMI910669A0 publication Critical patent/ITMI910669A0/en
Publication of ITMI910669A1 publication Critical patent/ITMI910669A1/en
Application granted granted Critical
Publication of IT1245221B publication Critical patent/IT1245221B/en

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/50—Monitoring users, programs or devices to maintain the integrity of platforms, e.g. of processors, firmware or operating systems
    • G06F21/57—Certifying or maintaining trusted computer platforms, e.g. secure boots or power-downs, version controls, system software checks, secure updates or assessing vulnerabilities
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/70—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2211/00—Indexing scheme relating to details of data-processing equipment not covered by groups G06F3/00 - G06F13/00
    • G06F2211/007—Encryption, En-/decode, En-/decipher, En-/decypher, Scramble, (De-)compress

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Software Systems (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Storage Device Security (AREA)
  • Stored Programmes (AREA)

Abstract

Un sistema di elaborazione è previsto per uso con una sorgente di programma asportabile ed inseribile, quale una cartuccia ROM (9) o disco flessibile (12), e comprende una CPU (1) per eseguire istruzioni di programma immagazzinate, direttamente dalla cartuccia ROM o dopo essere state lette in una memoria RAM (3). Un chip di generazione video/audio (2) fornisce operazioni di base aperte a tutti i programmi, e funzioni perfezionate aperte solo a programmi selezionati. L'accesso alle funzioni perfezionate viene abilitato comparando una sequenza di byte emessa dalla CPU, in risposta alle istruzioni del programma, con una sequenza di riferimento fornita da un generatore di sequenza pseudocasuale (fig. 2), ed abilitando le funzioni perfezionate dipendentemente dal risultato della comparazione.A processing system is intended for use with a removable and insertable program source, such as a ROM cartridge (9) or flexible disk (12), and includes a CPU (1) for executing stored program instructions, directly from the ROM cartridge or after being read into a RAM memory (3). A video / audio generation chip (2) provides basic operations open to all programs, and improved functions open only to selected programs. Access to the improved functions is enabled by comparing a byte sequence issued by the CPU, in response to the program instructions, with a reference sequence provided by a pseudorandom sequence generator (fig. 2), and enabling the improved functions depending on the result. of the comparison.

ITMI910669A 1990-03-16 1991-03-13 PROCESSING SYSTEM IT1245221B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB909005916A GB9005916D0 (en) 1990-03-16 1990-03-16 Computer system

Publications (3)

Publication Number Publication Date
ITMI910669A0 ITMI910669A0 (en) 1991-03-13
ITMI910669A1 ITMI910669A1 (en) 1992-09-13
IT1245221B true IT1245221B (en) 1994-09-13

Family

ID=10672710

Family Applications (1)

Application Number Title Priority Date Filing Date
ITMI910669A IT1245221B (en) 1990-03-16 1991-03-13 PROCESSING SYSTEM

Country Status (4)

Country Link
ES (1) ES2026091A6 (en)
FR (1) FR2659763A1 (en)
GB (2) GB9005916D0 (en)
IT (1) IT1245221B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2073495C (en) * 1992-07-08 1999-01-12 Michael Wright Option selection and control
TW230247B (en) * 1992-10-01 1994-09-11 Hardson Kk
US6789199B1 (en) 2000-02-08 2004-09-07 International Business Machines Corporation Tamper resistance with pseudo-random binary sequence program interlocks

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57111792A (en) * 1980-12-29 1982-07-12 Fanuc Ltd Program copying preventing system
CA1183276A (en) * 1981-11-25 1985-02-26 Charles B. Heffron Method for identifying a system-allied physically separable program memory and a data processing system utilizing said method
US4462076A (en) * 1982-06-04 1984-07-24 Smith Engineering Video game cartridge recognition and security system
US4777590A (en) * 1984-10-29 1988-10-11 Pictorial, Inc. Portable computer
US4688169A (en) * 1985-05-30 1987-08-18 Joshi Bhagirath S Computer software security system
CA1270339A (en) * 1985-06-24 1990-06-12 Katsuya Nakagawa System for determining a truth of software in an information processing apparatus
JPH074449B2 (en) * 1985-10-04 1995-01-25 任天堂株式会社 Cartridge for game machine and game machine using the same
JPS62192836A (en) * 1986-02-20 1987-08-24 Nec Corp Enciphered storage device

Also Published As

Publication number Publication date
GB2243701A (en) 1991-11-06
ITMI910669A1 (en) 1992-09-13
ITMI910669A0 (en) 1991-03-13
FR2659763A1 (en) 1991-09-20
GB9105482D0 (en) 1991-05-01
ES2026091A6 (en) 1992-04-01
GB9005916D0 (en) 1990-05-09

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Legal Events

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0001 Granted