Dual DPTR in the Debuger

Hi!

I use a T89C51CC01 from Atmel WM, I would like to use the dual dptr feature on my program. When I run the Debugger, i can't switch the DPTR.

In the µC manual, it says that we must set the DPS bit of the AUXR1 register. I do this just before writing on the DPTR. When i set this bit and write just after on the DPTR register, the debugger show me that i write on the first DPTR and not in the second ?

Does anyone konw why ?

save_table_eeprom:
MOV	A,EECON
ANL	A,#01H
CJNE	A,#00,save_table_eeprom ;Test si l'EEPROM n'est pas occupé
;Début de la programmation
MOV	EECON,#02H
ORL	AUXR,#020H
MOV	DPTR,#0081H
MOV	AUXR1,#01H
MOV	DPTR,#01C8H ;here it's my problem!
MOVX	@DPTR,A ;I rite on the bad DPTR
;Lancement du cycle d'écriture en EEPROM
MOV	EECON,#054H
MOV	EECON,#0A4H
RET

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