papapopop
Member
Hi,
working on a bootleg Galaga labeled MGG-703A(CPU) and MGG-703B(video) makes me crazy. Sometimes it runs, sometimes I get different RAM errors sometimes it hangs up after 10 minutes. I use a test equipment plugged in as cpu1 so I can stop the cpu1 and test the RAMs and they are all OK. I am not sure if I have the right ROMs or have another hardware failure.Does anyone have a running pcb or known good roms and send the file to me ? I made some tests with namco roms, galaga bootleg roms and I always get no positive results. Or anyone an idea on which area of the pcb to look ?
In my repair career I never thought about dropping a pcb out of the window,this time I thought about it.
Thanks for help
Greets to All
working on a bootleg Galaga labeled MGG-703A(CPU) and MGG-703B(video) makes me crazy. Sometimes it runs, sometimes I get different RAM errors sometimes it hangs up after 10 minutes. I use a test equipment plugged in as cpu1 so I can stop the cpu1 and test the RAMs and they are all OK. I am not sure if I have the right ROMs or have another hardware failure.Does anyone have a running pcb or known good roms and send the file to me ? I made some tests with namco roms, galaga bootleg roms and I always get no positive results. Or anyone an idea on which area of the pcb to look ?
In my repair career I never thought about dropping a pcb out of the window,this time I thought about it.
Thanks for help
Greets to All