Before you start you must first identify which Mortal Kombat II board you have. The Mortal Kombat II board came in 2 varieties. Each board requires different roms to be switched out in order to upgrade your game to MK2+. These are the 2 types of boards and the rom files that go with each...

Select your board type

Installation notice: Beware not to install these ROMs backwards. The side that the notch faces is indicated on the PCB. If installed backwards it will damage the chip instantly

 

For the older style board (the 4mb board) you will need to replace UG12, UJ12, UG20, and UJ20 on the main board. Then, you will need to replace the U10 and U11 ROMS on the daughter board. Below shows a picture of the daughter board with the 2 ROMS replaced.

 

UJ12, UG12, UJ20, and UG20 go into the main board in these locations shown below:

 

Lastly, SU2 gets replaced on the sound board below.

 

Installation notice: Beware not to install these ROMs backwards. The side that the notch faces is indicated on the PCB. If installed backwards it will damage the chip instantly

 

For the newer style board (the 8mb board) You will need to replace SU2 on the sound board. Also, You will need to replace UG12, UJ12, UG16, UJ16, UG20, and UJ20 on the main board.  Below shows a picture of the main board with the 6 ROM locations.

 

 

SU2 gets replaced on the sound board below. 

Created by ZPaul2Fresh8

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