Emu XL-7 & MP-7 User's Group

I tried to set up Midi quest for my XX7, i wrote to soundquest about how to 
do that and they told me

...you will see information on how to set the PCH number for the driver to 
match the chip IDs for the MP7

So my questions are
What is a PCH number?
How do i know what Chip IDs has my XX7 [mp7 with TSCY]

Anybody can help?

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