1994-07-08
1996-08-20
Voeltz, Emanuel T.
39518303, 39518306, G06F 1100
Patent
active
055487130
ABSTRACT:
A processing unit couples to a system bus and includes a microprocessor which tightly couples to a local memory. The processing unit also includes an addressable electrically erasable programmable read only memory (EEPROM) unit which couples to the microprocessor and to the system bus. The EEPROM unit stores in first and second separate regions, on-board diagnostic (OBD) routines and boot routines, respectively. The OBD routines are organized into a plurality of categories or phases. The processing unit includes a register accessible only by the microprocessor which, under the control of the OBD routines, is loaded with a number of predetermined values at the beginning of each individual OBD routine for identifying a particular phase and subphase of testing to be performed. Means coupled to the register is directly connected to display a first phase portion of the contents of the register for indicating during which phase of testing a failure occurred. The phase and subphase contents of the register are used to identify the actual test which failed. This information provides an index into a test dictionary which indicates the specific component or group of components which failed.
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Microsoft Press Computer Dictionary --Second Edition p. 167.
Hirsch Thomas S.
Keeley James W.
Petry Keith L.
Bull HN Information Systems Inc.
Driscoll Faith F.
Kemper M.
Solakian John S.
Voeltz Emanuel T.
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