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| Boundary drawing and area filling logic for a display system |
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| Data acquisition system using non-linear digitization intervals |
| Accordingly, it is a general object of the present invention to provide an improved data ... |
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| High speed data acquisition system and method |
| OF THE PREFERRED EMBODIMENTS Reference will now be made to the drawings wherein like structures ... |
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| Data acquisition system and method with a selectable sampling rate |
| The present invention comprises an improved data acquisition system for digitizing and storing ... |
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| Data acquisition system comprising real-time analysis and storing means |
| OF THE INVENTION Although the circuit of the invention is particularly intended to be used in an ... |
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| Dither signal insertion inversely proportional to signal level in delta-sigma modulators |
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| Model train control system |
| OF THE PREFERRED EMBODIMENT Referring to FIG. 1, a model train control system 10 includes a ... |
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| Control, sound, and operating system for model trains |
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Multi-process emulator suitable for testing software under multi-process environments
| Details |
Inventors: Kondo, Megumu; Masuda, Satoshi;
Assignee: Hitachi, Ltd. (Tokyo, JP)
Primary Examiner: Coleman; Eric
Assistant Examiner:
Attorney, Agent or Firm: Fay, Sharpe, Beall, Fagan, Minnich & McKee
An emulator for use in a multi-process environment for simulating a computer and supporting testing of software, where the emulator detects a first event corresponding to a desired process on the basis of process information; detects a second event corresponding to a desired address on the basis of address information; stores in a memory the output of the first event and sets the output of the first event in the memory, when the desired process is being operated and resets the content in the memory, when a process, which is not desired, is being operated, such that the emulator can detect a final desired event on the basis of both the process information and the address information. |
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DETAILED DESCRIPTION An object of this invention is to provide an emulator working efficiently under a multi-process environment, in order to remove the drawbacks of the prior art techniques.
Other objects of this invention will be obvious from the description in the specification and the drawings.
In order to achieve the above object, an emulator according to this invention is constructed by adding means to reset the event detection state described above, when the event occurrence conditions are no longer fulfilled, to the detection and memory means for the pre-event E.
sub.
1 and the detection means for the post-event E.
sub.
2.
When the break point is set in the address X in the process A, in the above example, the process A as the pre-event E.
sub.
1 and the address X as the post-event E.
sub.
2 are set.
As soon as the process A begins to be operated, the pre-event E.
sub.
1 occurs and this fact is memorized.
When a process switch from the process A to the process C takes place, the memory of the pre-event E.
sub.
1 is reset.
For this reason, even if the address X occurs in the process C, no break point occurs erroneously.
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