I have a Neo-Geo 4Slot and I'm getting issues with games that use bank switching.
https://youtu.be/PIetfcOdI3g
Two games I have it occurs with are Sam Shodown 4 and Metal Slug X.
It occurs on all slots.
Here is a final check list of all I've done:
* Flashed to Unibios and checked the roms, see attached pictures
* Cleaned the carts and edge connectors real well (contact cleaner)
* Cleaned the board to board connectors
* Verified voltage @ the harness and PS
* Verified cartridges worked on another Neo Geo (1slot)
* Checked internal battery
* Cleared work ram.
* Verified the PORTWEL line goes low (or is it high?)
I do have a logic probe (Saelea[sic]) and a reagol scope if I need to probe anything.
https://youtu.be/PIetfcOdI3g
Two games I have it occurs with are Sam Shodown 4 and Metal Slug X.
It occurs on all slots.
Here is a final check list of all I've done:
* Flashed to Unibios and checked the roms, see attached pictures
* Cleaned the carts and edge connectors real well (contact cleaner)
* Cleaned the board to board connectors
* Verified voltage @ the harness and PS
* Verified cartridges worked on another Neo Geo (1slot)
* Checked internal battery
* Cleared work ram.
* Verified the PORTWEL line goes low (or is it high?)
I do have a logic probe (Saelea[sic]) and a reagol scope if I need to probe anything.

