Verification of System Integrity by Sequential Testing
Original Publication Date: 1986-Feb-01
Included in the Prior Art Database: 2005-Mar-08
Execution of a selected group of tests verifies machine operation including any add-on feature hardware by invoking a single test. On a system consisting of a printer and keyboard, controlled by an Intel 8088 microprocessor, with possible add-on feature hardware, a Verify test is used to give an operator an additional set of tests to determine the integrity of the system beyond what is tested during the power-on self-test sequence. The Verify test tests any add-on feature hardware and demonstrates the print-erase capability of the connected printer at all current levels of the printer. A selected group of interrupt vector locations is reserved in the RAM (random-access memory) of the 8088 microprocessor for diagnostic routine addresses. These addresses are initialized during the power-on self-test of the 8088 microprocessor.