引用 21006091:
膜拜大神了！整套成本多少？

给你演示一个程序.
这里是一个8位无符号数除以8位无符号数的程序,应该还可以再写得高效率点,有符号除法复杂一点点.
RAM内存单元定义:
000000H : 余数
000001H : 被除数
000002H : 除数
000003H : 商
000004H : 计数

程序代码(下面部分用表达式形式来表示CPU的指令):
000000H    A2A1A0 = 0x000000;
000001H    RAM = 0x00;
000002H    A2A1A0 = 0x000004;
000003H    RAM = 0x07;
000004H    A2A1A0 = 0x000003;
000005H    A = RAM;
000006H    RAM = A << 1;
000007H    A2A1A0 = 0x000000;
000008H    A = RAM;
000009H    A2A1A0 = 0x000001;
00000AH    B = RAM;
00000BH    A = (A << 1) | (B >> 7 & 0x01);
00000CH    B = B << 1;
00000DH    RAM = B;
00000EH    A2A1A0 = 0x000000;
00000FH    RAM = A;
000010H    A2A1A0 = 0x000002;
000011H    B = RAM;
000012H    A2A1A0 = 0x000016;
000013H    判断A - B没有借位跳转到000016H;
000014H    A2A1A0 = 0x00001B;
000015H    无条件跳转到00001BH;
000016H    A2A1A0 = 0x000000;
000017H    RAM = A - B;
000018H    A2A1A0 = 0x000003;
000019H    A = RAM;
00001AH    RAM = A + 1;
00001BH    A2A1A0 = 0x000004;
00001CH    A = RAM;
00001DH    RAM = A - 1;
00001EH    A2A1A0 = 0x000004;
00001FH   判断 A - 1没有借位跳转到000004H;

上面程序执行完成后结果在RAM内存单元里[s::lol]
大约250个时钟内完成计算