D9090 & D9060 Device change docs

To change the device number you will need to cut some or all of the Tracks which are connected to IC : 7G pins 22,23 & 24.
IC ref: 7G is a   MOS 6532 and is located on the CBM-DOS board which is the Top PCB , i.e- The first PCB you see when you lift the metal cover off.
Because there are 3 plated through holes located along side pins 22,23 & 24 it is very easy to cut all 3 tracks and then install 3 jumper pairs or even a small dip switch.
The chart below very simply explains what you need to cut to achieve a particular device number.

DEVICE              PIN 22      PIN 23     PIN 24
       8                         1               1              1
       9                         1               1              0
       10                       1               0              1
       11                       1               0              0
       12                       0               1              1
       13                       0               1              0
       14                       0               0              1
       15                       0               0              0

1 = Joined Track , i.e.- Normal-no change (Short circuit )
0 = Cut Track , (Open circuit )