kb0jjn
New member
I have tested about all of the customs and cleaned the legs, only two fell off, a new record. The z80a cpu chips are new and working in another board. I had one ram chip a 2114 that got very hot and burned my finger. I replace that one, a 2114-2, with a 2114-3 < don't think a 100 nano secs would make a difference here but I may be wrong.
This board I am working on is a different ver. than the working one. This board has all of the cpu chips on one side but the working board has the cpu chips in the middle of the board.
this is the type of board I am working on right now
http://www.ebay.com/itm/DIG-DUG-ATA...574?pt=LH_DefaultDomain_0&hash=item2320ae522e
and this is what my working board looks like.
http://www.ebay.com/itm/DIG-DUG-not...933?pt=LH_DefaultDomain_0&hash=item232182e975
Is there a rom difference in these two types of boards?
I am thinking right now that is my problem as just about everything I have tested seems to have tested good. Even changing the inputs gives correct results. The first thing that gets tested is usually the ram then roms, Right?
I have dumped the roms but have not tested with mame. Probably not zipping them right or something.
The only thing I seen that may be an issue is an 74ls159 right next to the first cpu chip. The enable lines are not doing anything.
This board I am working on is a different ver. than the working one. This board has all of the cpu chips on one side but the working board has the cpu chips in the middle of the board.
this is the type of board I am working on right now
http://www.ebay.com/itm/DIG-DUG-ATA...574?pt=LH_DefaultDomain_0&hash=item2320ae522e
and this is what my working board looks like.
http://www.ebay.com/itm/DIG-DUG-not...933?pt=LH_DefaultDomain_0&hash=item232182e975
Is there a rom difference in these two types of boards?
I am thinking right now that is my problem as just about everything I have tested seems to have tested good. Even changing the inputs gives correct results. The first thing that gets tested is usually the ram then roms, Right?
I have dumped the roms but have not tested with mame. Probably not zipping them right or something.
The only thing I seen that may be an issue is an 74ls159 right next to the first cpu chip. The enable lines are not doing anything.
