Does C51 support Extend Stack(stack located in external memory)

I'v got a 8051 that has a extend stack pointer in sfrs(named ESP), and the stack can be located in extern memory(xdata). The new ESP sfr has 4bits, so with the old sp this 8051 gets a 12bit stack pointer...
Does C51 support Extend Stack(stack located in external memory)

I'v got a 8051 that has a extend stack pointer in sfrs(named ESP), and the stack can be located in extern memory(xdata). The new ESP sfr has 4bits, so with the old sp this 8051 gets a 12bit stack pointer...
Check/locate Stack

Hello, How is it possible to locate the stack (both internal and extended). Whow is it possible to check the size of allocated memory ? I would like also to put stack (only) in extended memory....
Check/locate Stack

Hello, How is it possible to locate the stack (both internal and extended). Whow is it possible to check the size of allocated memory ? I would like also to put stack (only) in extended memory....
I wish to locate the STACK at 64H. How do I do it?

I wish to locate the STACK at 64H. How do I do it? Can you tell me how to do it using the STARTUP.A51 file? Can you also tell me how to do it using compiler/linker directives instead of the STARTUP...