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乗算機 機械語change

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ハード的な乗算機の考察

x=0h0ff * y=0h0ff を考えた時
乗算命令語を xyn1,xyn0 として
bit[0]=0,1 上のを下の最下位に持っていく

xyn[1],ffff       xyn[0],ffff裏レジ
 a|                  a|  
 d|                  d|
x0|     FE          x0|   FF             
 h|                  h|
 f|                  f|
 f|________________  f|________________
[1] A D y0 h 0 f f   [0] A D y0 h 0 f f

アキューム[1],[0]ffff= FEFF となるように
命令的には2命令。読み込み2回H,L

マシン語 00c3 009c 何かのジャンプの命令語にchangeとか。
マシン語 01c3 0099 機械1のジャンプの命令語にchange

に、使えないかな。

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