journal of all scince V.1. NO.1 | Page 48

:local (< " @
+_H

_ ?% 8 _

n7-_ local 8 _

Z
M

@

. % @I

label

%

%8

K

B

%8U% 2 M, % 6

.* % $

„

label % %

I

8

=

label I

"%8U % ,.

B%
%8U% 2

:
fact macro x,y
local L
mov ax,1
mov cx,x
L:mul cx
dec cx
jnz L
mov y,ax
endm
seg1 segment
fact 5,bx
fact 7,dx
seg1 ends
G duplicate declaration of: L (10)

.8

AU # F ' 10 A
]

%

,Z (< " ,Z
(

imul
idiv
_C _

_T. _ \ ]
. "

C

mov al,FFH
mov bl,2
imul bl

- %

B% . 8
. J.

mov al,FFH
mov bl,2
mul bl

J %
= ? 8X
/ ` . 8 "%8U ? J div mul

%8.
8

mov ax,8000H
mov dx,0
mov bx,2
div bx

‚^3 % #

A

B%

( : & 01/

!K " K

2

" div mul ?% 8
% $ I
% 8

g d

J

mov ax,8000H
mov dx,0
mov bx,2
idiv bx

: $
: $
: $
: $
15
14
ax=-1*2=-2=FFFEH ax=255*2=510=01FEH ax= 2 /2=2 =4000H ax= -215/2=-214=C000H
dx=0
dx=0
:
\ " Q : (< "
dest

.

% $

and *

* %

: and

%

and dest,source
1 and 1=1
0 and x =0
.

dest

or *

% $

* %

%

: or

or dest,source
0 or 0=0
1 or x =1
dest

.
xor dest,source
0 xor 0=1
1 xor 1 =0

0 xor 1=1

% $

xor *

* %

%

: xor

1 xor 0=1
.

mov ax,0FE0H
I

1 + , % dest : not