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MITSU S-JIHP: Sega JVS I/O Helper PCB

Mitsurugi-W, I'm wanting to wire up a Taiko no Tatsujin drum using the instructions that defor posted ( https://www.arcade-projects.com/for...help-buying-the-right-256-stuff.568/post-6279 ). While I can definitely do this using an 26pin AMP RA Connector directly to my Sega I/O Ver. 1, I'm wondering if it'd be possible for me to wire this up using the S-JIHP Helper PCB instead to keep all my wiring consistent.



1) Are the DB25's 5V pins (24 and 25) considered AVCC?


2) Also, defor's instructions say to
"connect each AD pin with a 10 kΩ resistor connected to AVCC.
AD0 -- 10 kΩ -- AVCC
AD1 -- 10 kΩ -- AVCC
AD2 -- 10 kΩ -- AVCC
AD3 -- 10 kΩ -- AVCC
AD4 -- 10 kΩ -- AVCC
AD5 -- 10 kΩ -- AVCC
AD6 -- 10 kΩ -- AVCC
AD7 -- 10 kΩ -- AVCC
AD8 -- 10 kΩ -- AVCC"

If Player 1 has AD0/AD1/AD2/AD3, and Player 2 has AD4/AD5/AD6/AD7... where would AD8 get wired?


Thoughts?
 
All VCC is tied together on the S-JIHP. So pull it from anywhere you want. VCC is 5v for those who do not know. There are a few ways for you to do this with S-JIHP. Since you just want to prevent floating signals on player two you could just make a plug for the P2 DB25 port with just the AD signals connected to 5v with the 10k resistors.

I think the AD8 is a typo. The Sega JVS I/Os support four devices per player so 8 total. AD0-AD7.
 
Mitsurugi-w said:
All VCC is tied together on the S-JIHP. So pull it from anywhere you want. VCC is 5v for those who do not know. There are a few ways for you to do this with S-JIHP. Since you just want to prevent floating signals on player two you could just make a plug for the P2 DB25 port with just the AD signals connected to 5v with the 10k resistors.

I think the AD8 is a typo. The Sega JVS I/Os support four devices per player so 8 total. AD0-AD7.
Click to expand...
Thanks! That totally helps. I'll start building once my order of resistors comes in. ^^
 
Okay, I worked on my Taiko drum controller, but have hit a bit of a dead end with it in that it's triggering all the AD inputs even though I have resistors on them and a dummy DB25 with resistors on the P2 side.

Images: http://imgur.com/a/8Dfm4

The drum sensors are those ribbon based kind that clip down at a PCB. I desoldered the Star/Select button wires, and I cut the traces on the PCB to make sure that chip would be an issue, and soldered wires at the top of the sensor area, then screwed the plastic ribbon back down.

I took two DB25s and I soldered two 10kΩ resistors to each of the 5V spots, and connected one resistor to each of the AD inputs (AD0~AD7). On my Player 1 one, I hooked up the Start/Coin/GND/AD0/AD1/AD2/AD3.

But when I went to test it, I noticed the game was triggering all the sensors, giving random drum hits.

So, just to test it, I unhooked the wires I ran to AD0~AD3 and just left the resistors running from the 5V to the AD inputs... and with two DB25s plugged in (P1 and P2), it was still triggering all the sensors.

Thoughts?
 
I've never seen how these droms connect to the I/O. Do you have pictures of the original connectors? Defor can probably help here better than me.
 
Mitsurugi-w said:
I've never seen how these droms connect to the I/O. Do you have pictures of the original connectors? Defor can probably help here better than me.
Click to expand...
I don't have a picture of an actual Taiko no Tatsujin cab's wiring, but I do have a few pictures I've saved from various Taiko threads...


- Some type of custom-build JVS relay board made by someone in Italy so that a Jamma-based Sega I/O can work in a JVS Taiko cab (if it didn't have the actual Taiko i/o boards):
http://i.imgur.com/kLSInpJ.jpg


- Taiko Cab Wiring Diagrams:
http://i.imgur.com/aPJtYgA.jpg
http://i.imgur.com/wGRepRs.jpg


- Taiko Part Info:
http://i.imgur.com/7GbGERs.png
http://i.imgur.com/fB9BCnZ.png
 
Mitsurugi-w said:
I've never seen how these droms connect to the I/O. Do you have pictures of the original connectors? Defor can probably help here better than me.
Click to expand...
Here ya go. This is a non-hacked version. Figured I should get in on this thread since I spent a small fortune this week acquiring 2 arcade drums...

http://imgur.com/a/QnEkr
 
Did a bit more tinkering, but still am getting auto drum hits.

I remembered that defor said, "Yes, I normally only use one drum, but unless you ground the analog inputs for the second drum (or connect a second analog device), the analog inputs are floating, and will act as repeated drum hits."
So I ran ground wires to the 4 AD inputs on my player 2 plug.

The input screen seems to be a little less frantic than it was, so that's progress.

Do I need to run the ground wires all from the same GND spot (ditto for the resistors, all from the same 5V/VCC spot)? I've been splitting them between the two Db25 spots to make soldering easier in the small space.
 

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It shouldn't matter. All grounds and VCC are tied together.
 
Still having problems wiring up my Taiko drum (I've managed to fully ground the player 2 side, but player 1 still auto fires all the buttons). That said, I figured out the JVS Analog I/O mapping the Namco 246/256 Taiko no Tatsujin games and wanted to share that:

AD0 = player 1 left drum
AD1 = player 2 left rim
AD2 = player 2 left drum
AD3 = player 1 right drum
AD4 = player 1 right rim
AD5 = player 1 left rim
AD6 = player 2 right rim
AD7 = player 2 right drum
 

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hi,
i have a question for you Mitsurugi-w.

do you think it is possible to couple your Sega JVS I/O Helper PCB with official sega guns from a sega guncab?

I know it's weird but let me explain,i want to play to let's go island (and transformers in a near future) in my gun cabinet HD but axis are reversed so if I want to play this game on my guncab I have to flip the bezel upside down and alter some wiring for the analogue on the RA26pin connector on the I/O board and flip the mirror dip on the gun board so it's not very convenient.......you think your pcb can help me to play this game without changing anything on my machine?

thanks :)

edit:i think the response is no,the PCB need DB25 and DB15 conector
 
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You are trying to use light guns with sensors, right? This won't help you with that. It will let you use X/Y guns for certain games if you wanted to avoid always moving your sensors, etc.
 
thanks for reply,
yes,i have official sega type II guns on my gun cabinet with sensors around the screen,if i do not find a solutioni i will turn to your PCB :)
 
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