1. There are three modes: debug, self-test, query.
2. This card can recall 88 recently records.
3. This card has UP and DOWN keys and easily to use, don't need any skill.
4. When press UP and DOWN keys at the same time, card will enter self-test mode (display 0000-FFFF).
5. In self-test mode, when press UP and DOWN keys at the same time, card will return to debug mode.
6. In self-test mode, when press any key of UP and DOWN, card will return to query mode.
7. In query mode, if port has a new code, card will enter debug mode automatically.
8. When computer is busy in POST, don't press any key until it stops (display 00 or FF or any fault code for a long time).