TITLE Demonstrating Multiplication Instructions  (mul.asm)

.686
.MODEL flat, stdcall
.STACK 4096

INCLUDE Irvine32.inc

.data

.code
main PROC
    mov  al, -4		    ; AL = 0FCh = 252
    mov  bl, 4
    mul  bl             ; CF =     AX =

    mov  al, -4
    mov  bl, 4
    imul bl             ; OF =     AX =

    mov  ax, 2000h
    mov  bx, 100h
    mul  bx             ; CF =     DX =                   AX =

    mov  eax, 12345h
    mov  ebx, 1000h
    mul  ebx            ; CF =     EDX =                  EAX =

    mov  ecx, -16
    mov  edx, -20
    imul ecx, edx       ; OF =     ECX =
    
    mov  ecx, 12345h
    imul ebx, ecx, 200h ; OF =     EBX =
    exit
main ENDP
END main