Static information storage and retrieval – Read/write circuit
Patent
1988-03-15
1989-09-05
Hecker, Stuart N.
Static information storage and retrieval
Read/write circuit
365195, 2353825, G11C 700, G11C 1140
Patent
active
048645427
ABSTRACT:
A portable memory cartridge includes a mass memory, a data bus, an address bus, control signal lines for carrying signals for making access to the mass memory, a password memory for storing a flag indicating the inhibition of read/write access to the mass memory, a password memory for storing a particular authorized password, and a comparator for comparing an input password with the particular password set previously. Whe the comparison results in coincidence, a control signal required for the access is supplied to the mass memory for enabling the access to the mass memory in data read or write mode or data read and write mode.
REFERENCES:
patent: 3473159 (1967-10-01), Cantrell et al.
patent: 3576544 (1971-04-01), Cordero, Jr.
patent: 4102493 (1978-07-01), Moreno
patent: 4183085 (1980-01-01), Roberts et al.
patent: 4434471 (1984-02-01), Hildinger
patent: 4458315 (1984-07-01), Uchenick
patent: 4670857 (1987-06-01), Rackman
Oshima Toshio
Ozeki Tomotaka
Bowler Alyssa H.
Hecker Stuart N.
Hitachi Maxell Ltd.
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