> I started to use MPLAB as Fabio suggested this week.
> My W_TEMP register :
> w_temp    equ    0x70

Once again, don't do this.  This only defines the symbol W_TEMP, it does not
reserve the byte at 70h.

> So I thought that if it would be in common space for all pages it will be
> Ok. But seems it is not.
> Can't figure that out yet, but I will.

W_TEMP isn't "in" any memory space.  It is merely a symbol that you seem to
assume represents a memory address.  However, the RAM at 70h is also mapped
to the same offset within the other banks on many PICs, but not all.  It
seems the newer and bigger ones are more likely to do this.  You need to
check the data sheet for the specific PIC you are using.


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