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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。$ t: p; w+ }! {6 B% F# a: M u
0xa10002 first controller
! W% D) q. O" V5 @0xa10004 second controller8 G/ j8 P6 c1 S, I
) s8 b; o: {9 D3 ~1 n0xA10003/0xA10005/0xA10007 are the DATA ports, 0 ~ _9 ]' i1 K( h
which read from/write to joypad 0xA10009/0xA1000B/0xA1000D 2 G t% Z, J) r* B4 a" z
are the CTRL ports, which set the input/ouput
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3 Q- ~% A! L/ _ g a1 k想讓subroutine在任何時刻都有效,
' X( p7 D3 O; L R# Y9 y( t- v. x就必須找global section。' D$ j6 I+ f4 Z8 t- ]+ n
控制器是其中一個,
7 k# A2 x- U8 t除了控制器當然還有其他可寫入的section存在。 |
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