![]() ![]() ![]() Also shorten the wires as much as possible to prevent extra interference. Make sure you strip only a very small amount of insulation off of the wires so that you don't have to worry about shorting any nearby points. I heated up and applied a little bit of extra solder to each of the eight points to make soldering a little bit easier. You can leave the solder on the board for reattaching the shield. Heat up each of the points individually while lifting the parts of the shield off of the board. To access the points you'll need to solder to the shield needs to be removed. ![]() My board had a large metal shield covering most of the board. Pin one corresponds to the pin with the circle near it, or the pin to the left of the notch. You'll need to solder wires to seven points on the top of the console's motherboard based on the diagram of the motherboard above, and the diagram of the MM3 chip below. ![]() The actual PlayStation MM3 modchip installation is pretty straightforward. An ATtiny chip for around a dollar, along with an Arduino (to act as an ISP programmer) which you probably already have, might be a cheaper alternative to a PIC based modchip. There are also AVR/Arduino sketches which can be used for a modchip, which I may look into in the future. I'm looking into making MM3 chips which I can sell on eBay since it seems like a decent way to make some extra money. So if you already have a PIC programmer, or you're going to be installing a lot of chips, it might be worth looking into. The chip costs a little over a dollar, and a programmer costs about $50. If you want to save some money you can actually buy a PIC12C508A chip, and program it yourself. A programmed MM3 modchip for American consoles.In my case the MM3 chip I bought from eBay already had wire preinstalled, so I didn't need to add the wire. Here's a list of items you'll need for your MM3 modchip installation. Sony released many different versions of the PlayStation, if your model is different you'll need to find another guide, or at least a different wiring diagram. This post covers the SCPH-7501 PlayStation 1 console with the PU-22 NTSC board inside. I purchased my chip from a US seller on eBay preprogrammed and prewired for $8 shipped. Buying a chip from China is cheaper, but takes longer to arrive. Cost primarily depending on how long you want to wait for your chip. You can buy an MM3 chip for not a whole lot of money, they're around $4-10. MM3 modchips also allow you to run games from other regions. An MM3 modchip allows the PlayStation to boot directly to game backups burned to CDs. This is a similar post, but covering anSCPH-7501 PlayStation 1 MM3 modchip installation. In April I wrote a post on how to install a MM3 modchip into a PM-41 NTSC PSone console. ![]()
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