| 摘要 |
A base board 10 carries four daughter cards 12a, 12b, 12c and 12d. Three of the daughter boards 12a, 12b, 12c are stacked on the front side of the base board 10, and the fourth daughter board 12d is carried on the rear side of the base board 10. Modifying means are provided on the daughter cards for modifying addresses sent from the base card to the daughter cards. This allows the daughter cards 12 to be identical, and still enables individual addressing of the daughter boards according to their position in the stack.
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