Recent content by lithy

The part above hit me while I laid in bed last night and I was just coming back to post it! You obviously explained it in your post in the Final Vendetta thread but I just didn't quite comprehend it late last night when I put up my posts. But now understanding that what I was seeing as Metal...

What I need to figure out now, insert the jmp back to C00444 at the end of the Knight's Chance attract mode as suggested by nauman So...how do I figure how what instruction is ending the attract mode and looping it back around to the beginning? I've determined that from a fresh boot of the...

What I have managed so far was to start to try to understand how this table controlled the slot selection mechanic $10FD81BIOS_SYSRET_STATUSbyteBIOSInternal value which stores the function code that SYSTEM_RETURN will call. 0 : Init bram/select valid game for eye-catcher 1 : Set the EL-LED...

Background: (Unimportant, blah, blah, blah) So I had decided that I wanted to learn just the tiniest little bit about looking at/reading/understanding some of the assembly code behind the games. I have no real background in anything that would make me assume that even the basics would be easy...

I don't want to distract the discussion too far from Final Vendetta, but this is interesting. I just began to look at Knight's Chance in the MAME debugger because it does the exact same thing. It just loops its own attract mode and never moves on to another slot. I know basically nothing...

I just got done finishing an MV-2F with lines in the graphics, so while it is still fresh I can post some stuff here for you to start checking, you can see my repair log here. https://www.neo-geo.com/forums/index.php?threads/help-for-mv-2f-with-bram-issue.272773/ I'm definitely no expert, but...

Just a heads up that I'm getting a Request Access notice for the video now. As for why it works but not in the shell, after confirming you have it in the boards assembled in the shell the right way (and remember the cart guide is not reversible), then I guess the first thing I would try would...

Works so well it plays as Metal Slug 3? Now I'm confused.

There are a few spots on the backside of the P-roms that I would be checking continuity on both ends of these spots. I can't tell exactly what's going on but looks like possible damage.

While not a great sign for how the cart was treated otherwise, the board makes connection with the contacts further up not down at that edge where the damage is. If this was the only damage I wouldn't really expect the game to not work before testing. Clean the contacts, try it and see what...

This guy saw a similar problem that was traced to a bad diode at D4. https://neo-geo.com/forums/index.php?threads/mv1c-problem-with-battery.260972/page-2#post-4243597

Bust-A-Move labeled (so US market) carts are in this shell. SamSho and Windjammers also except that they're clear. I'm sure there are others if you go looking. Thrash Rally was the last link cable game at the tail end of 1991, so possibly they just had a had a working mold and kept using it...

What brand is the RAM? Post here by James of JNX says the Sony RAM is usually good. https://www.neo-geo.com/forums/index.php?threads/mv1-a-mv1-fz-battery-mod.250241/#post-3997892 As for how long it lasts, I'm just about to wrap up a test on my MV-1A where it looks like it will have taken 12...

Have you seen this thread? https://neo-geo.com/forums/index.php?threads/mv1c-problem-with-battery.260972/post-4243568 I know most of the recommendations cover what you already did with C3, PC2, and PC4 but maybe there is something else that might help. I recently removed C3 from an MV-1A that...

You will want an MVS to JAMMA adapter such as the JNX Big Red. Your Big Red wiring and the 4 slot are not exactly JAMMA so to avoid any damage to the a JAMMA board, get an adapter. You will not be able to connect any of the following to an MV-1C, the Memory Card/Headphone board, EL panels, or...