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[单选题]
8253计数器0的地址为40H,则其方式控制字地址为( )
A
41Hb.42Hc.43Hd.44H
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参考答案
试题答案:
C
答案解释:
计数器0地址40H,计数器1地址41H,计数器2地址42H,方式控制字寄存器地址43H。
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