hey i need opinions from all of u guys about the flow of the application
ex:
.model small
.code
org 100h
data:
jmp procces
dat1 DB 'a'
procces:
mov ah,02h
mov dl,'a'
int 21h
int 20h
END data
ok from what i read on the book, the program should jump the data variabel section in order to evade the execution from data variabel isnt it. well im just wonder if the data section really JUMPED by the program, shouldnt be the data variabel doesnt recognized by the program? ::)
Hi Zerofox,
The program can recognize the variable, but it jumps directly to the statement mov ah,02h
A more efficient way :
.model small
.stack
.data
dat1 DB 'a'
.code
start:
mov ah,02h
mov dl,'a'
int 21h
mov ah,04Ch ; Exit to DOS
int 21h
END start
[attachment deleted by admin]
Hi Zerofox,
As the program is coded, there is no data section. Here is your code modified to check that the data is reconized:
.model small
.code
org 100h
data:
jmp procces
dat1 DB 'a'
procces:
mov ah,02h
mov dl,dat1
;mov dl,'a'
int 21h
mov ah,10h ; wait for user to press key
int 16h
int 20h
END data
Here is the batch file I used to assemble and link (I assumed from the org 100h that the program is supposed to be a COM file).
ML /Fl /Sa /c nodata.asm
pause
LINK16 /TINY nodata.obj,nodata.com,nodata.map;
pause
And here is the map file the linker generated:
Start Stop Length Name Class
00000H 00111H 00112H _TEXT CODE
00112H 00112H 00000H _DATA DATA
Origin Group
0011:0 DGROUP
Program entry point at 0000:0100