1. After post can use for program check point data d0 - d7 read write code 2. Program check interrupt3. Self - repairing programs check for damaged files before launching the program 4. Usually , every installed program checks occasionally for new version availability 5. Software program check point display . note : this test card only troubleshooting on power - on 6. Usually , every installed program checks periodically whether a new version is available 7. Also can use test card port 80h 300h for software program check point display 8. Also can use test card for software program check point display . note : this test card only troubleshooting on power - on 9. Error code message , will know defective position . also can use test card for software program check point display 10. In this example , you enter a character from the keyboard and the program checks if the input character is a letter
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