Up 8086 q7
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1) The document contains an assembly language program that multiplies two 32-bit signed numbers, -500000 and 1000000, stored at memory locations 2000h and 2004h respectively. 2) The program loads the numbers into registers, performs a series of integer multiplications to calculate the product, and stores the 64-bit result across four memory locations 2008h to 200Eh. 3) The result of multiplying the two numbers is -500000000000, as shown by the values stored in the four memory locations.
![C:HomeNIT0_ClassAutumn 2012Microprocessor Labup Programs8086up_8086_Q7.asm 05 August 2012 15:08
; Q 7> Multiplication of 2 32bit signed numbers
SW 2000h
[2000h] = 05EE0h ; A = -500000
[2002h] = 0FFF8h ;
[2004h] = 04240h ; B = 1000000
[2006h] = 0000Fh ;
[2008h] = (ans) ; C = (A * B)
[200Ah] = (ans) ;
[200Ch] = (ans) ;
[200Eh] = (ans) ;
.
A
1000h
mov ax, 0000h
mov ax, [2000h]
mov bx, [2004h]
imul bx
mov [2008h], ax
mov [200Ah], dx
mov cl, 08h
sar dx, cl
mov dl, dh
mov [200Ch], dx
mov [200Eh], dx
mov ax, [2000h]
mov bx, [2006h]
imul bx
add [200Ah], ax
adc [200Ch], dx
sar dx, cl
mov dl, dh
adc [200Eh], dx
mov ax, [2002h]
mov bx, [2004h]
imul bx
add [200Ah], ax
adc [200Ch], dx
sar dx, cl
mov dl, dh
adc [200Eh], dx
mov ax, [2002h]
mov bx, [2006h]
imul bx
add [200Ch], ax
adc [200Eh], dx
hlt
.
GO 1000h
INT ;(try '.' here)
SW 2008h ; ans = 07800h
-1-](https://image.slidesharecdn.com/up8086q7-120812151637-phpapp01/85/Up-8086-q7-1-320.jpg)
Up 8086 q7
- 1. C:HomeNIT0_ClassAutumn 2012Microprocessor Labup Programs8086up_8086_Q7.asm 05 August 2012 15:08 ; Q 7> Multiplication of 2 32bit signed numbers SW 2000h [2000h] = 05EE0h ; A = -500000 [2002h] = 0FFF8h ; [2004h] = 04240h ; B = 1000000 [2006h] = 0000Fh ; [2008h] = (ans) ; C = (A * B) [200Ah] = (ans) ; [200Ch] = (ans) ; [200Eh] = (ans) ; . A 1000h mov ax, 0000h mov ax, [2000h] mov bx, [2004h] imul bx mov [2008h], ax mov [200Ah], dx mov cl, 08h sar dx, cl mov dl, dh mov [200Ch], dx mov [200Eh], dx mov ax, [2000h] mov bx, [2006h] imul bx add [200Ah], ax adc [200Ch], dx sar dx, cl mov dl, dh adc [200Eh], dx mov ax, [2002h] mov bx, [2004h] imul bx add [200Ah], ax adc [200Ch], dx sar dx, cl mov dl, dh adc [200Eh], dx mov ax, [2002h] mov bx, [2006h] imul bx add [200Ch], ax adc [200Eh], dx hlt . GO 1000h INT ;(try '.' here) SW 2008h ; ans = 07800h -1-
- 2. C:HomeNIT0_ClassAutumn 2012Microprocessor Labup Programs8086up_8086_Q7.asm 05 August 2012 15:08 SW 200Ah ; ans = 095ADh SW 200Ch ; ans = 0FF8Bh SW 200Eh ; ans = 0FFFFh . ; => -500000000000 -2-