Hi

sorry for the delay.

after I changed the variable to data instead of xdata, then problem shifted to some other variable. now I changed that too.
but do not know which variable will be affected.


Assmebler code for assigning of variable with different memory types.
------------------------------------------
xdata unsigned char LockingStatus;
-----------------------------------------

c code line : LockingStatus = 1;
; SOURCE LINE # 242
; SOURCE LINE # 243
035A 900000 R MOV DPTR,#LockingStatus
035D 7401 MOV A,#01H
035F F0 MOVX @DPTR,A



--------------------------------------------------------
data unsigned char LockingStatus
--------------------------------------------------------

c code line : LockingStatus = 1;
; SOURCE LINE # 242
; SOURCE LINE # 243
0352 750001 R MOV LockingStatus,#01H

----------- end of assembler code
I am zero in assembly language. so i do not understand what is going on in the above code. so dont know whether it is correct or not. please advice.

I also want to know, when declaring variables, whether we need to follow any definite order, like declare 'data' variables first, then declare 'xdata' variables etc ?

this is not isolated problem. it happened some time back also.
suddenly working program decomes like this and I do some patch work to make it work.

but I never diagonised the root cause of the problem. I must do it now. I do not have debugging tools either.

when I display the value of the variable in terminal it shows zero not the assigned value.

Haribabu