NEO-FTC1B board

Picture courtesy of [MVS-Scans].

Multiplayer extension board (only ?) used with Kizuna Encounter - Super Tag Battle to allow 4 players to play on the same MVS board. It forms a Y splitter with 2 JAMMA edges to connect two monitors, two pair of speakers and two 2-player controls.

It multiplexes the inputs thanks to the regular joypad inputs on the JAMMA edge and the input from a 4-wire (actually 3 used) cable that connects to the output port of the MV1B or MV1C, it also provides analog buffering for the video signals and power for the speakers (amp under the heatsink).

OUT1 is player selection. OUT2 is unused, OUT3 is used for detection.

When OUT1 is low:

• P1 reads EDGE 1 (right), player 1
• P2 reads EDGE 2 (left), player 1

Whe OUT1 is high:

• P1 reads EDGE 1 (right), player 2
• P2 reads EDGE 2 (left), player 2

When OUT3 is high:

• EDGE 1 player 1 button A is pressed
• EDGE 2 player 1 button A is pressed
• EDGE 1 player 2 button B is pressed
• EDGE 2 player 2 button B is pressed

The AD8044 is a quad rail to rail op-amp with 150MHz bandwith.