Quote:
Originally Posted by cbmeeks
SUCCESS!!!
I finally put the scope on it and noticed that the address bus and data bus were held high.
I also tested the reset and clock which both appeared OK.
So then I toned out every address and data pin from the CPU to the ROM and noticed that I must have missed one. D5. So another bodge wire later and behold!
This unit originally had WB1.2 so I swapped out the ROM with a spare 500 so now it's running WB1.3.
After 20+ years this Amiga breathes again. There could be other faults...but I'm excited all the same.
Next step is to remove the slot edge connector next to the CPU. I don't have any cards for it and there is some green corrosion on the pins. I figured I can remove that and clean the pads underneath. I don't imagine it will be that hard finding a replacement.
|
Great to hear you found the problem. Regarding the edge connector, it won;t be that easy to find an 86 pin card edge connector and they are not easy to come by.