Hi all,
got a MV-1C board I picked up off ebay with the intention to 'consolise' it and for some reason the A button for player 1 is no longer working.
I haven't got too far with this project yet and was simulating controller input by grounding the necessary jamma pin in order to navigate the bios/hardware test menu. Intially I was able to select hardware test (using button A) and then press start to change from the grid pattern to colour test but now the A button no longer functions (confirmed by trying a game in the unit).
I traced the jamma pin for button A to the capacitor resistor network the input and output output go low when I press A, traced from the CR to a pin on the NEO-YSA2 which also goes low when pressing button A.
So it would seem the necessary input is reaching the chip, unfortunately there is no pin out for the YSA2 or schematic specific to the MV-1C (that I can find) so should I just assume the chip is buggered?
cheers for any enlightenment you can offer!
got a MV-1C board I picked up off ebay with the intention to 'consolise' it and for some reason the A button for player 1 is no longer working.
I haven't got too far with this project yet and was simulating controller input by grounding the necessary jamma pin in order to navigate the bios/hardware test menu. Intially I was able to select hardware test (using button A) and then press start to change from the grid pattern to colour test but now the A button no longer functions (confirmed by trying a game in the unit).
I traced the jamma pin for button A to the capacitor resistor network the input and output output go low when I press A, traced from the CR to a pin on the NEO-YSA2 which also goes low when pressing button A.
So it would seem the necessary input is reaching the chip, unfortunately there is no pin out for the YSA2 or schematic specific to the MV-1C (that I can find) so should I just assume the chip is buggered?
cheers for any enlightenment you can offer!