SYSTEM FOR DIAGNOSING GRAPHIC PROCESSING SYSTEM
PURPOSE:To easily perform interface between hardware, to guarantee the result data of an internal test, and to detect a defective part by enabling a test pattern and the result of the internal test to be checked from the outside. CONSTITUTION:An input part 5 and an output part 6 are connected to an...
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Main Authors | , , , , , , , , |
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Format | Patent |
Language | English |
Published |
22.09.1989
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Subjects | |
Online Access | Get full text |
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Summary: | PURPOSE:To easily perform interface between hardware, to guarantee the result data of an internal test, and to detect a defective part by enabling a test pattern and the result of the internal test to be checked from the outside. CONSTITUTION:An input part 5 and an output part 6 are connected to an exter nal transmission line, and the processings of coordinate transformation or clip ping, etc., are performed by firmware incorporated in a ROM4. The ROM4 also stores the test pattern, and an MPU1 passes input information to the output part 6 after outputting the test pattern in the case of setting a diagnostic mode indication signal at a diagnostic mode after resetting a graphic processing unit. The test pattern is checked by remarking a checking bit at the outside. When no diagnostic mode is set, a processing is performed according to the instruction of the input information. |
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Bibliography: | Application Number: JP19880066215 |