Assembly

need help how to inverse

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Join Date: Aug 2009

Posts: 46

Reputation: jingo1126 is an unknown quantity at this point

Solved Threads: 0

jingo1126

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Light Poster

need help how to inverse

Sep 18th, 2009

ok i can inverse the code
like 1234 to 4321..but when i applied jmp and cmp i dont know what goes wrong with my data..
code without loop

 Help with Code Tags 
 Assembly Syntax (Toggle Plain Text) 
.model small
.stack
.data
.code
start:
mov ah,1
int 21h
push ax
 
mov ah,1
int 21h
push ax
 
mov ah,1
int 21h
push ax
 
pop bx
mov ah,2
mov dl,bl
int 21h
 
pop bx
mov ah,2
mov dl,bl
int 21h
 
pop bx
mov ah,2
mov dl,bl
int 21h
mov ah,4ch
int 21h
.model small
.stack
.data
.code
start:
mov ah,1
int 21h
push ax

mov ah,1
int 21h
push ax

mov ah,1
int 21h
push ax

pop bx
mov ah,2
mov dl,bl
int 21h

pop bx
mov ah,2
mov dl,bl
int 21h

pop bx
mov ah,2
mov dl,bl
int 21h
mov ah,4ch
int 21h

here is my code with loop

 Help with Code Tags 
 Assembly Syntax (Toggle Plain Text) 
.model small
.stack
.data
.code
start:
start1:
mov ah,1
int 21h
push ax
cmp al,0ah
je out1
jne start1
 
out1:
pop bx
mov ah,2
mov dl,bl
int 21h
mov ax,4c00h
int 21h
end start
.model small
.stack
.data
.code
start:
start1:
mov ah,1
int 21h
push ax
cmp al,0ah
je out1
jne start1

out1:
pop bx
mov ah,2
mov dl,bl
int 21h
mov ax,4c00h
int 21h
end start

my problem is with my loop how come it wont inverse

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Join Date: Jun 2009

Posts: 830

Reputation: wildgoose is a name known to all

Solved Threads: 94

wildgoose

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Practically a Posting Shark

Re: need help how to inverse

Sep 18th, 2009

You push each key until you get a linefeed 0ah then only pop one value. 0Dh is carriage return!

How many did you push? You need to count them! But using push-pop you're on the right track. Of course this is one method but it will work.

Last edited by wildgoose; Sep 18th, 2009 at 3:40 am.