Bingo! Forgot they use the over the chip bios. It wiggled loose. Popped it back in and my system (guess I should not use cmvs) works again. Many thanks.yeah thats how it looks like when the BIOS or CPU ain't working, for whatever reason
I'd recommend to clean the slot on the MVS itself
pics of the cart would help, same for Analogue CMVS PCB, I have a strong suspicion that they'll be using the same rotten MVS as the rest..
As for the “razor blade” here are the picsNo commentary on Analogue CMVS except - motherflower they are expensive - I had no idea such a thing even existed.
Normally I have a pile of crappy but working 1-slot boards for testing. Never know what weird and wonderful errors I'm going to get from untrusted carts, poorly executed boots, dodgy z80 test carts and other razorblades left over from the 80's in someones box of spares.
As for what's going on. That screen looks like the "I can't boot" screen.
Sometimes it will be static - couldn't boot so gave up - normally you get this of one the critical chips is missing altogether, or so badly damaged that it's doing nothing.
other times it will be flick on and off, with the click of death through the speakers - nearly booted but the watchdog detected a problem and rebooted, normally in an infinite loop.
I'm struggling to imagine how any cart could cause this much damage. Maybe a failed bootleg where they wired +5v right onto the address bus or something? Maybe some disgruntled arcade service tech in the 90's made a sabotage cart to mess up his boss? Starting to sound a bit paranoid...
If you wanted to open the suspect cart up and take some pictures of the boards (both boards, both sides) there might be some clues as to what happened, and what to do next.
Glad that helped, thats the positive hereBingo! Forgot they use the over the chip bios. It wiggled loose. Popped it back in and my system (guess I should not use cmvs) works again. Many thanks.
Bingo! Forgot they use the over the chip bios. It wiggled loose. Popped it back in and my system (guess I should not use cmvs) works again. Many thanks.
That looks like a ground decoupling cap to me. Although weirdly I don't think this is a failed bootleg - those are printed up like genuine mask roms. As others have pointed out, looks like its spent the last 10 years at the bottom of a well or something, corroded AF.
This is normal for multiple games. Check mvs-scans.comThat looks like a ground decoupling cap to me.
That is quite a good game, If OP were going to spend some time on it maybe something like this?This is normal for multiple games. Check mvs-scans.com
The coalmine cart is Aerofighters 2: https://www.mvs-scans.com/index.php/File:Aero_fighters_2_set2_b1_front.jpg
He already said the cart works.That is quite a good game, If OP were going to spend some time on it maybe something like this?
0) clean it
1) dump roms and compare to MAME set
2) probe the pins on Neo ZMC https://wiki.neogeodev.org/index.php?title=NEO-ZMC
3) Probe the pins on PCM https://wiki.neogeodev.org/index.php?title=PCM
4) probe the pins on NEO 273 https://wiki.neogeodev.org/index.php?title=NEO-273