A method and apparatus for sequencing the execution of a simulation system comprising at least two subsystem simulators. The simulation system further comprises a first and second simulator, a processor for executing program instructions of a control program stored in a memory coupled to the processor, a router for coupling first simulator inputs and outputs to second simulator outputs and inputs respectively, and an input device including a control and monitor panel for controlling said sequenc...

A loading and linking process allows for the flexible loading and linking of software modules into a memory space, without regard to the order in which symbols are defined and referenced in such software modules, and without generating dangling references. An unloading process allows for software module unloading/unlinking from an already linked set of software modules, also without generating dangling references. A loading/linking system may be used to perform these processes.

The present invention logs events which occur in the target software, and stores these in a buffer for periodic uploading to a host computer. Such events include the context switching of particular software tasks, and task status at such context switch times, along with events triggering such a context switch, or other events. The host computer reconstructs the real-time status of the target software from the limited event data uploaded to it. The status information is then displayed in a user-f...

A method for upsampling a digital audio signal is described. The method includes receiving a first digital audio signal including samples and having a first sampling rate. The method also includes outputting at least one sample from the first digital audio signal as part of a second digital audio signal, the second digital audio signal having a desired second sampling rate, the second sampling rate being higher than the first sampling rate. The method also includes incrementing a counter for eac...

A system and method improves a process of creating software programs for a variety of existing computing platforms. In particular, a developer receives an input file. The developer generates a formatted data file as a function of the input file. If the input file includes data, then the data contained within the formatted data file is stored in a predetermined format compatible with each of a plurality of computing platforms. Then the developer generates a common generation file using a predeter...

A system page is implemented to provide direct access to operating system data structures by user tasks. Frequently accessed data structures are located in the system page, and may be linked against during linking. The system page memory locations are mapped into user tasks as read-only memory locations, allowing read-only memory accesses during run-time. The system page reduces execution overhead without sacrificing system security.

According to the present invention, a "smart system call" may be implemented. The smart system call employs a code "stub" that is used to make function calls to privileged memory locations. The code stub includes facilities to determine the current mode of execution (e.g., privileged, unprivileged), and where the current mode is sufficiently trusted, allows a direct access to the desired memory address. If the current mode is not sufficiently trusted (e.g., unprivileged), an alternate indirect s...

A method for upsampling a digital audio signal is described. The method includes receiving a first digital audio signal including samples and having a first sampling rate. The method also includes outputting at least one sample from the first digital audio signal as part of a second digital audio signal, the second digital audio signal having a desired second sampling rate, the second sampling rate being higher than the first sampling rate. The method also includes incrementing a counter for eac...

A method for upsampling a digital audio signal is described. The method includes receiving a first digital audio signal including samples and having a first sampling rate. The method also includes outputting at least one sample from the first digital audio signal as part of a second digital audio signal, the second digital audio signal having a desired second sampling rate, the second sampling rate being higher than the first sampling rate. The method also includes incrementing a counter for eac...

A method and system of monitoring code as it is executed by a target processor is provided for debugging, etc. Standardized software code function preamble and postamble instructions are dynamically replaced with instructions that will generate a predetermined exception. The exception generates a branch to a conventional exception vector table. An exception routine is inserted into the vector table, and includes instruction(s) to disable the data and/or address caches. Subsequent instructions in...