how to operate the 128byte page divided memory up to 1K in c51 like Hynix HMS9xc8032?

how to operate the 128byte page divided memory up to 1K in c51 like Hynix HMS9xc8032?
In HMS9xc8032,the data memory is divided into 8 page(2 SFR page),SFR is also have a little different with standard 8051,but in this web,support a reg52.h header file only.
So,anyone can tell us how to operate the data memory?Best is that someone can offer the source code or application notes.

Thanks and Best Regards!

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