Vehicle computer diagnostic interface apparatus
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United States of America Patent
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-
Aug 1, 1989
Grant Date -
N/A
app pub date -
Sep 10, 1985
filing date -
Sep 10, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The communications adapter provides an interface between automotive vehicle on-board computer and a test computer running diagnostic software. Using a dual-ported random access memory, the circuit receives serial data from the on-board computer, preprocesses that data into a standardized data format, and places the standardized data directly into the memory space of the test computer. The dual-ported memory may be placed at a user selected address within the memory space of the test computer, so that it will not conflict with the diagnostic program running on the test computer. The invention is readily upgradable by uploading preprocessor software into random access memory, thereby making the invention upwardly compatible as new makes and models are introduced.
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