Naomi JVS I/O issue and differences?
Posted: Thu Apr 30, 2009 2:23 am
Having an issue here with the I/O board on the Naomi not accepting coin up. I have 2 different Naomi systems, as well as 2 different bios, and it's doing it on both.
I know it's not my systems because I have a 2nd I/O board that works completely fine. Also, when the one with the issue is connected, the games will not recognize the service button (on the system!) to give the game a credit either.
Both of the I/Os are different revisions and completely laid out different as well, component wise. By revision I mean in the test menu for the system, under JVS test, one reads version 1.09 with a date of November of '99, and the other is 1.07 with a date of June '99.
If you go to the Input Test of the one that has the issue, under coin it should be all 0000 for both P1 and P2 side, and when you insert credits it should go up, like this: 0001, 0002, 0003, 0004, etc. The one with the issue is showing 8000 on both sides and inserting credits does nothing.
The analog controls on the one with the issue seems to be bouncing all over the place, even though a joystick is the only thing connected, via JAMMA.
I can put the games on free play, but that's not a valid solution.
Anyone have any idea? I looked around but I haven't seen anyone mention anything about different I/O board revisions or versions at all.
JVS with an issue:
JVS with no issue:
I know it's not my systems because I have a 2nd I/O board that works completely fine. Also, when the one with the issue is connected, the games will not recognize the service button (on the system!) to give the game a credit either.
Both of the I/Os are different revisions and completely laid out different as well, component wise. By revision I mean in the test menu for the system, under JVS test, one reads version 1.09 with a date of November of '99, and the other is 1.07 with a date of June '99.
If you go to the Input Test of the one that has the issue, under coin it should be all 0000 for both P1 and P2 side, and when you insert credits it should go up, like this: 0001, 0002, 0003, 0004, etc. The one with the issue is showing 8000 on both sides and inserting credits does nothing.
The analog controls on the one with the issue seems to be bouncing all over the place, even though a joystick is the only thing connected, via JAMMA.
I can put the games on free play, but that's not a valid solution.
Anyone have any idea? I looked around but I haven't seen anyone mention anything about different I/O board revisions or versions at all.
JVS with an issue:
JVS with no issue:
