SNROM nightmare

qbradq · Post by **qbradq** » Tue Apr 05, 2011 4:50 pm

checked it out. was immediately confused by the attitude that treats PowerPak as the norm and describes a devcart as if it were something obscure. *not approving*

That wiki page is in response to those that treat the PowerPak as the norm. The PowerPak does not work on clone systems, which is not good for me.

I won't begrudge you not wanting to buy an MMC1 repro board. I'm sure you have your reasons. But I will mention that it is specifically designed to work with modern ROM and RAM chips, with no rewiring.

Post by **Memblers** » Tue Apr 05, 2011 6:20 pm

Do you have a multi-meter to check for shorted or open connections?

Only problem I had with my first rewired cart was some intermittent shorting of a bent-up pin. Putting electrical tape around it solved the problem. But if you can get a good cut (with an exacto knife or similar) I think it's better to cut the traces instead of bending the pins.

Sounds like your cart should work, only thing I can suggest is checking for bad connections, a continuity test.

qbradq · Post by **qbradq** » Tue Apr 05, 2011 6:34 pm

I reviewed the datasheet for that ROM chip. It should be 100% compatible with what is in the document you linked to. Timing looks good too.

Roni · Post by **Roni** » Wed Apr 06, 2011 1:32 am

SUCCESS!!@!!!!!!1!1!!
okay memblers was on to something. it was the trace from 2 to 22 that I forgot to cut. the tutorials on Devcarting need to be seriously updated and I volunteer to help with that as soon as I'm done having fun.

3gengames · Post by **3gengames** » Wed Apr 06, 2011 8:32 am

I agree. First thing's first, though.....how about we fix the EPROM pinouts with the right enable, /CE, so people won't get confused there.

marvelus10 · Post by **marvelus10** » Wed Apr 06, 2011 10:54 am

Roni wrote:SUCCESS!!@!!!!!!1!1!!
okay memblers was on to something. it was the trace from 2 to 22 that I forgot to cut. the tutorials on Devcarting need to be seriously updated and I volunteer to help with that as soon as I'm done having fun.

I'm glad to see you got it going, I have always stayed away from trace cutting and preferred to rewire using cannibalized network cable. Once its all soldered and tested to work I use a little hot glue to hold it all neatly in place.