Did you mean the OSPi 1.3 board broke? If so, it’s gotta be fixed first, right? Or did you mean the RPi broke? Anyways, the main limiting factor on OSPi 1.3 is an on-board 500mA PTC fuse. It should look something like this:
If you want you can just solder a small wire (or a 0 ohm resistor) across it to bypass it.