Take the bank of CD/SCD RAM that your data is in (For example $7E), and multiply it by 8192 (each bank is 8K). This produces $FC000.
In Mednafen's Debugger (Alt+D to access debugger, Then Alt+3 to access memory viewer, and then press > once to access CPU Physical), press G to “goto” a RAM location. Enter FC000 and press enter.