find info about Xplorer FX3 cart

Discussion in 'Sony Programming and Development' started by megavolt85, Jul 9, 2019.

  1. megavolt85

    megavolt85 Peppy Member

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    Hi all.

    i'm find technical information about Xplorer FX3 cheat cartridge


    what i know:


    ROM 512KB (2x256 KB)

    SRAM 128KB


    Address space:

    Code:
    
    xx000000h
    
              ROM 256 KB
    
    xx040000h
    
              ROM 128 KB two bank switchable (SRAM?)
    
    xx060000h
    
              Registrs
    
    xx080000h
    
    
    *xx = 1F, 9F, BF
    
    
    Registrs:

    Code:
    
    1F060000h R/-
    
              bit 0 - ON/OFF switch
    
    
    1F060001h R/W
    
              read
    
              bit 8-0 - DATA PC Link
    
              write
    
              bit 5  - ROM2 bank switch
    
              bit 3-0 - DATA PC Link
    
    
    1F060002h R/-
    
              bit 0 - PC Link handshake
    
    

    What don't know:

    1) where mapped SRAM

    2) if SRAM not mapped initially, then what is register used for a mapping

    I can only assume that SRAM is available on the addresses xx040000h-xx05FFFFh, for mapping use bit 4 of register 1F060001h
     

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