Originally Designed By Anders Granlund from Sweden....

I've re-routed the PCB to fix the need for a bodge wire and updated the Silkscreen.

Tested on C070243 Rev.I ...

### Important ###

The expansion board **MUST** be installed directly onto the motherboard.

Using sockets **WILL NOT** leave enough clearance for the keyboard!

Parts List...

C1 to C6 | 100nF | 0805 | x6

R1 + R2 | 68Ω | 0805 | x2

R3 | 33Ω | 0805 | x1

NN5118160AJ DRAM | SOJ42 | x2

Installation

- De-solder the existing RAM.

- Solder the expansion board in place.

- Solder the four wires from the expansion board to the motherboard.

Signals: **MAD9**, **CAS1L**, **CAS1H**, **RAS1**

**MAD9** can usually only be found on the **MMU**

Routing the MAD9 Signal through a SPDT switch with one side to ground will allow switching between 1MB and 4MB...

MMU Pin

RAS1 | 18

CAS1L | 21

CAS1H | 22

MAD9 | 64