Abstract: Methods of extending capabilities of authenticated code modules (ACM) with minimal increase in code size comprises defining an authenticated code module (ACM) extension module using an entry of a Firmware Interface Table (FIT). The FIT contains a starting address of the ACM extension module that is located outside of a protected boot block. Based on the ACM extension module having been authenticated, the ACM and the ACM extension module may be processed together.

Abstract: Methods of extending capabilities of authenticated code modules (ACM) with minimal increase in code size comprises defining an authenticated code module (ACM) extension module using an entry of a Firmware Interface Table (FIT). The FIT contains a starting address of the ACM extension module that is located outside of a protected boot block. Based on the ACM extension module having been authenticated, the ACM and the ACM extension module may be processed together.

Abstract: Methods of extending capabilities of authenticated code modules (ACM) with minimal increase in code size comprises defining an authenticated code module (ACM) extension module using an entry of a Firmware Interface Table (FIT). The FIT contains a starting address of the ACM extension module that is located outside of a protected boot block. Based on the ACM extension module having been authenticated, the ACM and the ACM extension module may be processed together.

Abstract: Methods of extending capabilities of authenticated code modules (ACM) with minimal increase in code size comprises defining an authenticated code module (ACM) extension module using an entry of a Firmware Interface Table (FIT). The FIT contains a starting address of the ACM extension module that is located outside of a protected boot block. Based on the ACM extension module having been authenticated, the ACM and the ACM extension module may be processed together.

Abstract: A method of generating aircraft tactical alerts includes receiving track positions for two aircraft; receiving trajectories and static conformance bounds for the two aircraft; receiving current position for the two aircraft; generating tactical check segments and variable conformance bounds for the two aircraft based on the current position, the static conformance bounds, trajectory, adapted data, and the track positions; and generating a tactical alert if the variable conformance bounds overlap within a specified lookahead time. The variable conformance bounds can be either symmetric or asymmetric about projected tracks. The variable conformance bounds can use step functions, or continuously widening bounds up to the static conformance bounds. The variable conformance bounds can be based on modifying the static conformance bounds in two or three spatial dimensions.

Abstract: An embodiment includes retrieving performance monitor data from an I/O processor. A performance monitoring driver coupled to a performance monitoring unit may be registered as a private driver with a real time operating system of the I/O processor. Events within the I/O processor may be selected on which to gather data. The selected events may be sent as a message request to the real time operating system. The message request may be translated into the appropriate parameters based on a set of private group parameters that may be accessible by the real time operating system. The message request may be sent as a translated request to the performance monitoring unit. The pieces of data requested by the translated request may be returned to the performance monitoring driver. The pieces of data then may be sent to a location specified in the message request.

Abstract: An electronic system, such as a multimedia player, renders encrypted multimedia content from a local memory device or a remote multimedia server. In one embodiment, the multimedia player is implemented with a general-purpose computer executing tamper-resistant software (TRS). To prevent debugging of the TRS while it is executing, exception handlers that could be used by software debuggers or hackers are replaced by substitute exception handlers. Instrumented exceptions are occasionally caused by the TRS, and if these exceptions are not correctly handled by the substitute exception handlers, execution of the TRS may be terminated. To verify that the substitute (and non-substitute) exception handlers have not been tampered with by rogue software, the instructions of the exception handlers may be occasionally read and checked, and if any instruction has been changed, the TRS may be terminated. Various methods of protecting multimedia content are also described, in addition to a machine-accessible medium.

Abstract: A control system for precisely locating a tape upon deceleration thereof from a transport velocity to rest. A signal is generated which represents the distance traversed by the tape subsequent to an identified event. The signal is compared with a reference signal representing a desired distance-versus-time characteristic, and the error signal thus given rise to is used to either "plug" or dynamic brake the motor to control the stopping distance. Final position control logic produces and additional enabling signal should the tape overrun its desired position, and causes the motor to reverse to reposition the tape. In a preferred embodiment, a current limit circuit monitors current through the drive motor, and intermittently disables a portion of the drive circuit in response to a sensed overcurrent condition.