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发表于 2009-3-20 12:07:40
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其他蠻簡單的,就針對第一個問題再說明下。! J, {2 z5 W5 o' u4 ^2 t
0xa10002 first controller+ m+ Y* V* D+ b
0xa10004 second controller
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( c3 x) r' G' T! c0xA10003/0xA10005/0xA10007 are the DATA ports,
* x4 C3 g3 B* H/ O: w* \which read from/write to joypad 0xA10009/0xA1000B/0xA1000D - h/ l7 U5 O9 h0 ]# A
are the CTRL ports, which set the input/ouput
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想讓subroutine在任何時刻都有效,# Z" D+ M) c/ g! r
就必須找global section。% J6 `+ E& E+ {6 l
控制器是其中一個,. l& H$ ^8 X/ f7 \1 S; F
除了控制器當然還有其他可寫入的section存在。 |
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