Pues ya cambie los componentes EM16, EM11, EM12, EM13, EM14,EM15,EM18, FB3, las resistencias 330 estan correctas si hay continuidad de todos ellos con con el componente SEGA 315-5433, el pad me sigue haciendo lo mismo, me puse a leer y buscar que otros componentes intervienen, controladores, chips, pero me atore en la info donde dan a detalle como funciona el pad de 6 bottones.
"The original Sega Megadrive gamepad had four buttons: A, B, C and Start. The pad used a standard Atari-style 9-pin DSUB connector, and while the four directions and button B were mapped using standard Atari wiring (pins 1,2,3,4,6), button C appeared on pin 9. Most Atari-like gameport connectors have +5v available on pin 7, but the Sega variant has +5v on pin 5. Instead, pin 7 is used as a select signal, which multiplexes the pins normally occupied by the B and C buttons. When the select signal is high, B & C are readable, and when the select signal is low, the status of buttons A and Start appear on those lines instead.
When it came to adding extra buttons to the six button pad, Sega needed to find a way of multiplexing extra buttons in such a way that they didn’t cause compatibility issues. The obvious solution of making extra buttons replace the direction lines when the select signal is low wasn’t possible because the existing 3-button protocol already held the left and right lines low when select was low, presumably so software could distinguish the 3-button pad from a standard Atari-style joystick or Master System controller. Instead they went with a “magic knock” approach, in which software toggles the select line four times in quick succession. The new buttons appear on the directions during the high pulse following the third low pulse, and to identify the pad as a six button button, the direction lines are low and high for the low pulses before and after this, respectively."
por supuesto hahaha no entiendo nada de las señales ;( no se que mas hacer
https://wiki.megadrive.org/index.php?title=315-5433