/documents/GP2X/Piggy=>Midi Cable:

**page under construction. Video Coming soon

How to: Repin your GP2X Ext Cable!
***Click images for further explanations***

The purpose of this tutorial is to show you
how simple it really is to repin a cable for
the GP2X console. The outcome of this is to have
a cable that has the pins wired for adding midi output
on the GP2X and also Stereo Line outputs (optional)


.

Parts:
1 Samsung E810 cable (available here)
Small Needle Nose Pliers
X-Acto Blade
Small flat blad Screwdriver
Small Jewelers Phillips Screwdriver
Side/Flush cutters

 

Step 1: Opening your Samsung E810 cable

If you look closely at the Exp side of the E810
cable you will see 2 screws and 2 clasps hold the
connector together. We must first use the
phillips screwdriver to unscrew the 2 screws.

.

Using the X-Acto Blade (or a small flat blade), you
you can carefully ease open the connector on each side. Being careful NOT to break the tabs off of each side.

.

Take a look at the stock pin placement
of the E810 cable. The pins to the far left
*yellow & orange* are already in the correct
placement. the rest need to be pulled out (CAREFULLY)

Step 2: Removing the pins from the connector

Using the small needle nose you can carefully
pull the pins STRAIGHT out slowely (see the video for a more clear example of how to do this). Leave only the Yellow and Orange pins.

It should look like the image below.
Clean up some of the tangled mess being careful
not to break off any of the pins from the wires.

Step 3: Re-Installing the Pins

Using your Needle nose, place the Violet pin
oposite of the Orange pin in the 3rd slot of
the connector. This will act as our optional
Audio Ground Pin. The Violet Pin has a small
piece of shrink tube on it to act as an isolator.
I pull this back before install it and put it back
over the pin once i have secure the pin in place.

Some people might find this easier to do using
a small vice. The next pin to install is the green one.
It will be inserted into the 4th slot from the right
as seen in the image below. Use the Flat blade to
press it into the slot. If you feel resistance chances are you dont have it in correctly.

Continue with installing the Brown Pin next to
the Green Pin, but oposite to it (as seen in picture below). Once again, the pin should slide into the
open slot without much effort. If you feel rsistance remove the pin and make sure it's straight and that you are installing correctly.

Our next pin will be the White Pin. Install next to , but oposite of, the Brown Pin. Just as you did for the previous 2 pins.

At this point your connector should look similar
to the image below. If it does.. continue. Ocassionally look at the pins from the front of the connector to insure the pins are being installed straight and correctly.

The final pin is the Black Pin. It gets installed
in the slot furthest to the right, oposite the white pin. Once installed, double check all of your pins to ensure they are installed correctly and they aren't touching each other inside the connector and on the back of the connector.

Our GP2X EXP Connector should now look like the
image below. If it does, then we can proceed with the
final step of putting it all back together!

Step 4: Re-assemble the GP2X Connector

If the connector is correctly re-pinned, we no longer need the Blue/Red wires. You can cut them off. Unless you wanted to run video out on them. But thats a whole nother tutorial. :)

Being careful not to cause the pins to short
against each other, give the connector a light twist to
group the wires together for a clean installation
into the connector assembly.

Carefully slight the connector between the
locking pins to install it into the assembly.
Note the "keyed" slots on the top and bottom and
make sure you have the connector single slot down
onto the assembly side w/ the locking pins.
Sometimes the locking pins like to be difficult
to get in the right place. Just move slowely and carefully and you'll get the hang of it.

Our connector should look like the image below now.
Check to make sure none of the pins are touching each other. The wires are lightly twisted together to
insure they dont get pinched in the screw holes.

From here you can put the top of the connector assembly onto the connector and allow your tabs to snap the front edge of the connector housing closed. Again note the keying of the connector. sometimes you'll have to wiggle the connector a little bit in the assembly housing to get it to close properly. Once it's closed properly and can be held closed with little effort, reinstall the 2 screws that hold it shut on the other side.

 

Congrats! you've done the "hard" part of modifying your GP2X EXP cable!

Pinout Explanation:
Yellow - Audio Ground
Orange - Line Out Right
Violet - Line Out Left

Green - +3.3V (Power + )
Brown - RXD0/GPD0
White - TXD0/GPD1
Black - GND

Pin
1: Ground (Black) (Pin 1 on my pcb is indicated w/ a square pad, the rest are round)
2: RXD0 (Brown)
3: TXD0 (White)
4: Power (Green)

Further explanation of the GP2X Ext port
can be read here: GP2X Wiki

To learn how this cable gets connected to
your GP2X Piggy=>Midi project. Please read the next Tutorial! If you find any errors or have any questions please feel free to email me and I will help you to the best of my ability!