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A

Apocalypse

Hi guys,

It's finally happening thanks to a donation made by @nonosto!

So here we go:

1) BOM

PartTypeRef.Comment
IC1~4ICNEC µPD4701ACDIP24, 0.6"
IC5IC74LS138DIP16, 0.3"
IC6IC74LS02DIP14, 0.3"
RA1~2Resistor array4.7k * 8SIL9
FLT1~18EMI filter3 pin, 2.2nFCan be bypassed by bridging pins 1 & 3 (leave pin 2 unconnected!)
C1EC capacitor (polarised)100µF, 16V, 6.3mm0.1" pitch
C2~7Ceramic capacitor22nFAxial
CN5ConnectorFemale 2 x 15p, straight0.1" pitch, original one is keyed
CN6ConnectorMale IDC, 2 x 13p, angled0.1" pitch

2) Not all parts are required depending on how many players you want to support

1619517941427.png


3) CN6 pinout

CN6
13​
12​
11​
10​
9​
8​
7​
6​
5​
4​
3​
2​
1​
ANC+5VXB_4PXA_4P+5VXB_3PXA_3P+5VXB_2PXA_2P+5VXB_1PXA_1P
BNCGNDYB_4PYA_4PGNDYB_3PYA_3PGNDYB_2PYA_2PGNDYB_1PYA_1P

4) 1:1 layout

1619692859332.png


1619529168263.png


5) Gerbers

1619694091439.png


Gerbers are attached.
 

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A

Apocalypse

On S16B I think the reset signal would be an issue. Maybe you can still plug a DuPont cable on the trackball board using the part of the pin going through the PCB.
On S18 no problem at all.
 

bodgit

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Are there any alternatives for the µPD4701AC or is that the only choice for that IC? I've ordered some PCBs and I'm thinking to just install sockets for these chips so people can install as many as they want/need
 
A

Apocalypse

µPD4701, µPD4701A or µPD4701AC should be fine.
Not sure there are equivalents made by other manufacturers.
 

Tailsnic Retroworks

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Many thanks to all the people who has made this possible. I'm very very happy.

I have seen that @Apocalypse also has contributed to all. Many many thanks to you. I misread the first post, you made the replica
 

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bodgit

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If anyone wants/needs one of these boards, I can make another seven. I won't provide the µPD4701AC chips given their scarcity, but you can see there are sockets so you can source as many as you want and just plug them in:

IMG_2827.jpg


Send me a PM if you're interested.

PS. Those filters are a royal PITA to squeeze in.
 

playero

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playero

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What cabinet is that?

Do you have a list of connectors you used and wiring guide? How it connects to the track ball?

The cabinet is Joyro21 used in Korea about 2000, made by Andamiro.

Check trackball pcb Pinout and trackball I/O Pinout.

Good luck!

image-7.png


unnamed.png
 

bodgit

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The 26-pin IDC connector on the expansion board is not terribly practical for me so I'm going to whip up something like this that connects to the expansion board and then splits out each trackball to its own 6-pin JST NH connector (I've used EH here because it's the same 2.5mm pitch and KiCad seems to have every JST connector except NH!):
trackball breakout.png

I've been testing with a Happ trackball that comes with a .093" Molex 03-09-2062 connector so I can make up some individual 6-wire harnesses with a JST plug at one end and the mating Molex connector at the other.
 

playero

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Finally, I made Trackball controller to play

-Where's wally
-Sonic the hedgehog Arcade
-SDI

It works on Sega system 18 and Sega system 32 perfectly,

See the youtube movie.
View: https://youtu.be/DvgUiH2s-ws


But I can't play SDI game on SEGA System 16 multi.
Trackball is working properly, but Joystick and button are not on undercontrol.

View: https://youtu.be/3z_GiHp6Ejk
 

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A

Apocalypse

@playero

From that picture (a bit blurry sorry), it seems that digital inputs are taken from the edge connector:

1627891625120.png


There are many spare inputs on S16B, maybe SDI uses them after all and not the conventional joystick inputs.
 

bodgit

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Found them, they're on Z & a, underneath the test and service switch inputs.
 
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