[stella] Hardware Problems

["Chris Larkin" <clarkin@xxxxxxxxxxxxx>]

As the work on my flash cart continues on I'm still hitting some major bumps... During a routine test this morning, I programed the cart with Pitfall, and placed it in the VCS... when I fired it up.... nothing....  So I checked over everything, every little last detail, still nothing....

 

So I manually manipulated the Address Lines and read the data out of the EEPROM with a multimeter on the cartridge connector pins, and it coinsided perfectly with the data in the ROM image...  I even checked the FFD start address, and it is correct in the EEPROM...

 

This was working fine before, and as usual now it is Caput... so I seek the help of you all... I removed everything from the breadboard except the EEPROM and the hex inverter... the only thing I think this can be is the length of wire coming from the PCB to the EEPROM, it's about 6 inches a wire... do and of you think this could be the problem???

 

Or the EEPROM is corrupt some how, I cannot check all 4096 addresses by hand, so I checked about 35 different area's of the ROM, and they all came out correct.

 

--Chris