Start with the model marking, not the cartridge
SNK's MVS (Multi Video System) arcade platform exists as multiple motherboard assemblies. Common identifiers include MV-1, MV-1A, MV-1B, MV-1C, MV-1F, MV-1FZ, MV-2F, MV-4F and MV-6. Record the complete model code printed on the PCB and, where present, the separate slot-board marking.
The first digit after MV generally reflects the cartridge slot count, but additional letters can signal substantial hardware differences. Do not mistake a game cartridge label or a replacement daughterboard's marking for the motherboard model.
A quick identification matrix
| Family / example | Cartridge slots | Useful visual clue |
|---|---|---|
| MV-1 / MV-1F / MV-1FZ | 1 | Large single-slot motherboard; ports and BIOS packaging vary by revision |
| MV-1A / MV-1B / MV-1C | 1 | More compact single-slot layouts; not all have on-board controller sockets |
| MV-2F | 2 | Dual cartridge positions; some variants include an accessible memory-card socket |
| MV-4F family | 4 | Wide multi-slot assembly; inspect the slot board and daughterboards |
| MV-6 | 6 | Large six-slot motherboard; plan for its physical dimensions |
Three features that change a parts order
- Controller sockets: some single-slot and multi-slot boards have DB15 player ports on the motherboard, while other models depend on cabinet wiring. Don't infer this solely from the slot count.
- BIOS package: some boards use a socketed DIP ROM; others use a soldered device. A plug-in BIOS solution for one may not fit another.
- Memory card: a built-in connector, an external interface or no onboard socket are different situations. Check the exact model and accessory requirements.
Photograph five things before ordering
- The full PCB, top and underside, with a ruler or dimensions for mounting.
- The original silk-screened model code and revision.
- Cartridge slot count and any removable slot board.
- BIOS chip location and package, without extracting the chip.
- Power, video, audio and controller connectors, including evidence of repairs or jumpers.
A short example
Suppose a listing says 'Neo Geo one-slot with UniBIOS support.' That tells you little about whether its system ROM is a socketed DIP or soldered SMD device. A clear MV-1FZ or MV-1C photo and a BIOS close-up are more useful than the generic description.
Atelier Rocky is researching Neo Geo service modules. No module has been qualified for any model yet; this guide simply helps gather the information an actual compatibility test will need.
Sources and further reading
Original documentation and specialist references consulted for this article. Always check your model and revision.
Information only: no product compatibility test is being claimed. These workshop accessories are not yet for sale.