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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。; Y. k" K8 l' \5 d% u% N+ q' i
0xa10002 first controller
& {. k/ C% I! {4 O0xa10004 second controller
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0xA10003/0xA10005/0xA10007 are the DATA ports,
1 O% }1 ?4 O+ N! Awhich read from/write to joypad 0xA10009/0xA1000B/0xA1000D 4 N/ n' R3 K3 |: }2 M d9 D4 U
are the CTRL ports, which set the input/ouput
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想讓subroutine在任何時刻都有效,
. ?' C$ }/ S7 j, n1 Y1 D就必須找global section。
# l H4 {/ X& Y) ?1 I/ l' U7 H; b9 T( \控制器是其中一個,
) h, z4 C2 ?5 z" [- j除了控制器當然還有其他可寫入的section存在。 |
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