Does Keil simulator fix pdata on on-chip XRAM page 0 if on-chip XRAM MCU present?

I build a C51 program and want to show someone else how the pdata variable is stores in C51. The result seemed there exit some problem. I found if I select non on-chip XRAM such as Philips P89C51, the...
Does Keil simulator fix pdata on on-chip XRAM page 0 if on-chip XRAM MCU present?

I build a C51 program and want to show someone else how the pdata variable is stores in C51. The result seemed there exit some problem. I found if I select non on-chip XRAM such as Philips P89C51, the...
how to access on chip and off-chip XRAM of p89c51rd2 in c

how to access on chip and off-chip XRAM of p89c51rd2 in c
how to access on chip and off-chip XRAM of p89c51rd2 in c

how to access on chip and off-chip XRAM of p89c51rd2 in c
XRAM and peripherals on ED2 chip

Hi guys, I'm hoping someone has been here before and can help me out with this. I've got a big pile of code that runs nicely on the AT89C51ED2 chip. But I'm running low on variable space, so thought...