- UNIVERSE BIOS AES INSTALLATION, the PIGGYBACK METHOD
- ----------------------------------------------------
- These instructions give a method of installing a UNIVERSE BIOS that is alot easier than
- installing a socket, soldering is still required though. To do this you will need the
- following before you start;
- - A Philips screwdriver.
- - A soldering iron and solder.
- - A 15K 1/4 watt carbon resistor.
- - A small piece of wire.
- NOTE. If you follow this installation method you will void your UNIVERSE BIOS upgrade
- option if you have one. You can also do permanent damage to your NeoGeo if you damage
- the PCB in any way. Only do this if you are confident you can do it correctly, remember
- I take no responcibility for damage caused to your AES by following these instructions.
- -----------------------------------------------------------------------------------------
- Read through the following instructions a few times so you are sure you understand them
- before you start the process,
- - Remove the AES's protective casing (4 screws, 3 are located under the rubber raisers).
- - Locate the BIOS chip (it will either be above left or below right of the cart socket).
- The chip will normally have '531024' written somewhere on it.
- - Look at the chip carefully, you will notice a half circle cut into the side of it. Use
- that notch and the picture below to understand the numbering of the pins (pins 1 to 20
- on bottom counting left to right, 21 to 40 on top counting right to left).
- 40 21
- n n n n n n n n n n n n n n n n n n n n
- ---------------------------------------
- | |
- | |
- > |
- | |
- | |
- ---------------------------------------
- u u u u u u u u u u u u u u u u u u u u
- 01 20
- - Carefully cut pin 2 of the BIOS already attached to the PCB as close to the board
- as possible and bend the pin out straight parallel with the PCB. Be careful not to
- damage the PCB in this process.
- - Bend Pin 2 of your UNIVERSE BIOS out also in the same manner, remember to have the
- chip the correct way around (notch on the left).
- - Place the UNIVERSE BIOS chip on top of the existing bios chip and make sure all pins
- are aligned correctly and overlapped. If done correctly pin 2 on both chips will be
- straight out and not touching each other.
- - Using your soldering iron go around and solder all 39 of the UNIVERSE BIOS to the 39
- pins of the original BIOS. Do not use to much solder and make sure you don't join
- neighboring pins.
- - Take the resistor and solder one end to pin 2 of the original BIOS (the bottom one).
- Bend the resistor around and solder the other end to pin 40 of the stack (this pin
- is already soldered to the pin under it, just solder anywhere here to join it).
- - Use a small length of wire and solder one end to pin 2 of the UNIVERSE BIOS (the top
- one). Then solder the other end to pin 20 of the stack (this pin is already soldered
- to the pin under it, just solder anywhere here to join it).
- - In theory as long as you made no mistakes the installation is now complete. As a quick
- test you can power on the unit with no game inserted, if all is correct you will be
- presented with a blue screen. If there is a problem you will probably get some sort of
- screen with garbled flickering graphics. If this is the case then go through these
- instructions again double checking everything.
- - Reassemble the system.
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