Recent content by Lastsix

I've been working on a Shooting Master cab and can find very little info online about how the game should be mounted inside the cab. The game I'm working on has a board attached to a sheet metal plate sitting in left side of the cab. The only other picture I have found shows the bare board...

I put together a system 2 jamma adapter to work with choplifter and shooting master. It works fine but there is no sound. I double checked the pinout and everything is ok. Supergun works with other games and games work in cabinets with sound. Do you need a volume pot or amp between system 8 edge...

one of the gun pots shorted fuses on the lamp board, game seems ok now.

Game is working now but the guns aren't tracking properly. They jump randomly between 0 and 255. Unplugging lamp board from mainboard will zero inputs. Unplugging guns from lamp board will still show some jumping.

Fun fact kids; on system 18 pcb's pin D is not connected to the other 5v pins, and not having it connected on a harness will cause control issues. Ask how I know.

Putting in a 1N5819 diode seemed to do nothing.

Well...it's working now, at least on a supergun. Cannibalized a broken title fight and ended up replacing a TON of chips. As a sanity check I tested all previous configurations and they all worked. original roms, mcu and reprogrammed FD1094 decrypted roms, mcu and 6800 no mcu roms, no mcu and...

Cleaned the board, tested roms, and re-socketed the u115, game seems to be running... for now. Midway games don't have any sound without the sub-boards right?

Ml2032; I was still getting voltage, testing with a non-rechargeable is probably not a good idea. I rebuilt the charging circuit and will investigate replacing the diode.

I disabled the charging circuit on my mv1c and the battery was still dead in less than a day. With the battery removed and the power on I still see 3.7 volts being pushed to the battery holder.

winbond w24258s-70le I use an ml2032 and often charge it externally.

Don't know if it makes a difference, but my charging circuit is still intact. Can different brands of sram drain faster? I can pull some off another board but it's the same brand/type.

I have an mv1c that used to drain a full battery In about 30 minutes. I installed a ml2032 and universe bios to no effect. Removing capacitors c3, pc2 and pc4 from the board slowed the drain to about 24 hours. This is not a major issue and I understand that this can happen to the mv1b and mv1c...

I re-installed the original roms and mcu because I built a FD1094 programmer. Board seems to be stalled however. A lot of the ram on the right side of the board gets concerningly hot while running; looks like I have a ton of sockets in my future.

Don't know how helpful these old pics are. I can try getting better pictures later if there is an area you want to focus on.