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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。# S+ q' D! j* ]# X5 w
0xa10002 first controller3 e, b0 b2 f! W. Q2 ?. ?
0xa10004 second controller) j4 E: s) E. n" b& A# Q4 ?, M
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0xA10003/0xA10005/0xA10007 are the DATA ports,
" K+ w9 }& {; `- C8 g0 Kwhich read from/write to joypad 0xA10009/0xA1000B/0xA1000D . f8 C+ @' W D
are the CTRL ports, which set the input/ouput
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想讓subroutine在任何時刻都有效,; n# D. l" z2 N- k1 o
就必須找global section。. G! F6 E2 L( J* @, ~( J3 P* Y0 e
控制器是其中一個,
) c2 H% s' e' ~: w除了控制器當然還有其他可寫入的section存在。 |
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