I had ordered some lint free clothes so i can clean the slots, already scrubbed hell out of the carts, just wondering if i was wasting my time cleaning the carts
yep thats is whats worrying, they work fine with the one slots, but the 2 slot has been left unloved for a fair while so (fingers crossed it is just dirty contacts, will help when i can clean the slots properly)
The error is caused by the bios reading an address located on the game cart and getting a bad value in return. Get the error again, press D for the memory viewer and scroll to address 0x100 and take a screen shot.