I.  Multiply (MUL) instruction
                   --------------------------


                                 *---------* 
  1.  MUL byte:   AL * byte  ->  | AH | AL |
      --------                   *---------*

      where  byte  can be any one of AL, AH, BL, BH, CL, CH, DL, DH,
      or a byte in memory.

                                 *---------* 
  2.  MUL word:   AX * word  ->  | DX | AX |
      --------                   *---------*

      where  word  can be any one of AX, BX, CX, DX, SI, DI, BP, SP,
      or a word in memory.



               II.  Divide (DIV) instruction
                   --------------------------

                                    *--------------------------------* 
  1.  DIV byte:     AX / byte  ->   | AH (Remainder) | AL (Quotient) |
      --------                      *--------------------------------*

      where  byte  can be any one of AL, AH, BL, BH, CL, CH, DL, DH,
      or a byte in memory.

                                     *-------------------------------* 
  2.  DIV word:   DX:AX / word  ->   | DX (Remainder)| AX (Quotient) |
      --------                       *-------------------------------*

      where  word  can be any one of AX, BX, CX, DX, SI, DI, BP, SP,
      or a word in memory.



c:\>debug
-a 0100
1234:0100  jmp  0200
1234:0103
-a 0200
1234:0200  mov  al,72
1234:0202  mov  cl,04
1234:0204  shr  al,cl
1234:0206  sub  ah,ah
1234:0208  mov  bl,06
1234:020a  mul  bl
1234:020c  sub  ah,ah
1234:020e  mov  al,4e
1234:0210  mov  bl,08
1234:0212  div  bl
1234:0214  sub  ax,ax
1234:0216  mov  ah,4c
1234:0218  int  21
1234:021a 
-n a:MulDiv01.COM
-r cx
CX 0000
: 0219
-w
Writing 00219 bytes

-t
AX=0000  BX=0000  CX=0219  DX=0000  SP=FFEE  BP=0000  SI=0000  DI=0000
DS=1234  ES=1234  SS=1234  CS=1234  IP=0200   NV UP EI PL NZ NA PO NC
1234:0200 B072    MOV   AL,72
...
-t
AX=0007  BX=0006  CX=0204  DX=0000  SP=FFEE  BP=0000  SI=0000  DI=0000
DS=1234  ES=1234  SS=1234  CS=1234  IP=020A   NV UP EI PL ZR NA PE NC
1234:020A F6E3    MUL   BL   

-t
AX=002A  BX=0006  CX=0204  DX=0000  SP=FFEE  BP=0000  SI=0000  DI=0000
DS=1234  ES=1234  SS=1234  CS=1234  IP=020C   NV UP EI PL NZ NA PE NC
1234:020C 28E4    SUB   AH,AH
...
-t
AX=004E  BX=0008  CX=0204  DX=0000  SP=FFEE  BP=0000  SI=0000  DI=0000
DS=1234  ES=1234  SS=1234  CS=1234  IP=0212   NV UP EI PL ZR NA PE NC
1234:0212 F6F3    DIV   BL

-t
AX=0609  BX=0008  CX=0204  DX=0000  SP=FFEE  BP=0000  SI=0000  DI=0000
DS=1234  ES=1234  SS=1234  CS=1234  IP=0214   NV UP EI PL NZ NA PE NC
1234:0214 29C0    SUB   AX,AX