Secure computing device including operating system stored in non-relocatable page of memory
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 24, 2001
Grant Date -
N/A
app pub date -
May 19, 1999
filing date -
May 29, 1998
priority date (Note) -
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status (Latency Note)
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Abstract
A diagnostic program can check the security of a program. The program is stored at predetermined non-relocatable physical address in memory. The diagnostic program is loaded and checks the program at the predetermined physical address against a standard. The diagnostic program then indicates that the program is verified as secure if it meets the standard or non-verified as secure if it does not meet the standard. If the program is not verified as secure, then the diagnostic program may take remedial action such as disabling normal operation of the program, be transmitting a predetermined message via the system modem or downloading another copy of the program via the modem. The program is made non-relocatable using a special table look-aside buffer having a fixed virtual address register and a corresponding fixed physical address register.
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