--- "Alan B. Pearce" <A.B.Pearce@RL.AC.UK> wrote: >
This rather sounds like you have a bank selection
> problem for the SFR/RAM
> registers.
>
> It would be all to easy to address the EEPROM
> registers inadvertently
> through the FSR or by just having the register
> address set incorrectly.

Thanks Alan and Jinx for replying.
I am confused.Is it possible that if at all the buffer
overflows it the data will go to SFR and from there it
will write to the eeprom?

most of the time the at the EEPROM locations value 0
is written.
as i said I am using the first 4 locations of EEPROM.
are these locations more prone to corruption?
>
> Are you sure the RS232 data is not doing a buffer
> overflow and writing into
> the SFR area?
>
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