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Simulating dual DPTR & movx for AT89S8252

Hi!

I'm simulating my program (ASM) in uVision v7.02a.
When reading a byte from AT89S8252's internal EEPROM the movx instruction always uses the 1st DPTR, though the DPS is set to the 2nd DPTR. On the hardware the program works just fine.

Any ideas?

Regards,
Reinhard