tiff_lee
Grand Master
Hi all,
so i've got a MV-1C board and the A button input for player 1 is U/S, the circuit is good all the way to the NEO-YSA2 chip but since there is no pinout available (or schematic) online for the MV-1C I can only assume at this point the output of said chip is bad.
Can anyone enlighten me as to what the YSA2 actually does with the player input? According to:
https://wiki.neogeodev.org/index.php?title=NEO-YSA2
the YSA2 is a combination of the YM2610 and Z80 which are both related to sound playback so what does it have to do with player input?
From googling I can also see this chip is a common failure point on the MV-1C, someone on the neogeo forum came up with a workaround for a 'stuck' input (am I allowed to mention or link to that forum...?)
http://www.neo-geo.com/forums/showthread.php?274310-Fixing-stuck-inputs-on-MV-1C
again without a schematic i'm not too sure what's really going on here, it looks like the addition of a74HCT244/5 is circumventing the YSA2 and going straight to the 68K? if the 68K actually deals with player input why goto the YSA2 in the first place?
Edit:Totally made this in the wrong forum section, reported for a mod to move as I am unable to delete
so i've got a MV-1C board and the A button input for player 1 is U/S, the circuit is good all the way to the NEO-YSA2 chip but since there is no pinout available (or schematic) online for the MV-1C I can only assume at this point the output of said chip is bad.
Can anyone enlighten me as to what the YSA2 actually does with the player input? According to:
https://wiki.neogeodev.org/index.php?title=NEO-YSA2
the YSA2 is a combination of the YM2610 and Z80 which are both related to sound playback so what does it have to do with player input?
From googling I can also see this chip is a common failure point on the MV-1C, someone on the neogeo forum came up with a workaround for a 'stuck' input (am I allowed to mention or link to that forum...?)
http://www.neo-geo.com/forums/showthread.php?274310-Fixing-stuck-inputs-on-MV-1C
again without a schematic i'm not too sure what's really going on here, it looks like the addition of a74HCT244/5 is circumventing the YSA2 and going straight to the 68K? if the 68K actually deals with player input why goto the YSA2 in the first place?
Edit:Totally made this in the wrong forum section, reported for a mod to move as I am unable to delete