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樓主  發(fā)表于: 2010-09-01 11:35
I我在西門(mén)子語(yǔ)句表手冊里看到“NRGI (對整數求補碼)在 ACCU 1-L中形成 16位數值的二進(jìn)制補碼。二進(jìn)制補碼是通過(guò)將各個(gè)位取反(即用“0”替換“1”，用“1”替換“0”)后加“1”形成的。結果存儲在累加器 1的低字中。二進(jìn)制補碼相當于原碼乘以“-1”。狀態(tài)位CC 1、CC 0、OS和 OV則根據函數運算的結果來(lái)設置�！� 我看不懂怎么說(shuō)是補碼相當于原碼乘以負一呀？那位好心人可以給解釋一下，先謝謝了。
[ 此帖被王紹全在2010-09-01 11:47重新編輯 ]
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1樓  發(fā)表于: 2010-09-05 20:50
怎么沒(méi)人解釋一下呀

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