System and method for detecting access to a peripheral device us

Details System and method for detecting access to a peripheral device us System and method for detecting access to a peripheral device us

1995-06-30

1997-10-21

Oberley, Alvin E.

3951831, 395835, G06F 1100

Patent

active

056806205

ABSTRACT:
In a microprocessor, a debug facility traps accesses to a peripheral device, such as a speaker, residing at I/O port addresses. In one embodiment, a number of debug registers are provided for a system or an application program to set a trap at specific I/O or memory address, and to associate the specified address to an exception handling program. When another application program accesses the specified address, for example to adjust the settings of a speaker, the exception handling program is triggered to perform a specified task, such as to alert the program that the other application program accessed the device it intended to monitor.

REFERENCES:
patent: 5537536 (1996-07-01), Groven
Pentium Processor User's Manual, vol. 3: Architecture and Programming Manual, .COPYRGT. Intel Corporation, 1983, Chapter 17, Debugging, pp. 17-1-17-9.
Pentium Processor User's Manual, vol. 3:Architecture and Programming Manual, Intel Corp., Chap. 17, Debugging, pp. 17-1-17-9.

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