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发表于 2003-10-23 12:02:31
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- ----------------------------
- | Interrupt Port |
- ----------------------------
- | COM1 $0C $3F8 |
- | COM2 $0B $3F8 |
- ----------------------------
- 1st byte 2nd byte 3rd byte
- ----------------- --------------- ---------------
- |-|1|?|?|X|X|Y|Y| - |0|X|X|X|X|X|X| |0|Y|Y|Y|Y|Y|Y|
- ----------------- --------------- ---------------
- | | \ / \ / | |
- | | | | | |
- | | | ------------- ---------- |
- | | ---------- | \ \ |
- | | \_\_ _ _ _ _ _ _ \_\_ _ _ _ _ _ _
- | | |_|_|_|_|_|_|_|_| |_|_|_|_|_|_|_|_|
- | | X increment Y increment
- Left Button -- |
- Right Button ----
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