modification

So if you own a Panasonic Toughbook FZ-55, you may have noticed there's a sim card port behind a screw cover where the HDMI/USB cover on the back. While you can insert a SIM, you'll notice nothing happens. Basically by default (unless you bought the super expensive variant) SIM functionality...

I have moved all this information + created some fresh HQ diagrams to GitHub instead. https://github.com/Kippykip/PSX-Modchip Here are the HEX files required for modding a PS1 if you are burning your own chip. MrMario2011 made a good tutorial video on how to make them using a chip programmer...