How I made a Williams 4114 to 4164 adapter

[m_mcgovern]

How I made a Williams 4114 to 4164 RAM adapter

So, I finally got around to making two 4114 to 4164 RAM adapters for my Sinistar and Robotron. I thought I would just add my 2 cents to one of the great tutorials that are already linked to in this post from YellowDog:

http://forums.arcade-museum.com/showthread.php?t=81015&highlight=4164

1. First, get a 9-pin header (I got mine from Bob Roberts) and clip off pins 4 and 5 (counting from the left). Save those clipped pins.
2. Next, solder one clipped pin across pins 1-3 (GND)
3. Then, solder the next clipped pin across pins 5-7 (your new 5V).
4. Then, solder on trifurcon pins (I got mine from Bob Robers) onto pins 1-3, 5-7, and 8 one-by-one. I found it easiest to get them in position by "crimping" them with a pair of needle nose pliers first. Then, I dabbed on some flux and soldered them on, trying to keep them as aligned as possible.
5. Next, slide on the 9-pin housing (from Bob Roberts, of course) and voila, a 4114 to 4164 Williams RAM adapter in less than 30 minutes.

Here are some pics:
This pic shows which pins are clipped:

This pic has a better view of the clipped pins soldered across pins 1-3 and 5-7

The nice, compact finished adapter:

Let me know if you have any questions...

 

[Michael Roma]

Does this include Stargate???

While messing with the one I just picked up tonight I did notice how hot the 4116s got in a matter of minutes.

- Mike

 

[m_mcgovern]

It will definitely work with Stargate, Robotron, Joust, Sinistar, Bubbles, and Splat!. I think it should also work with Blaster and Defender, but please double check the pinout and look at the schematics to be sure on the last two.

 

[m_mcgovern]

One more change!

Upon further review, I ended up clipping off the short pin 9 to make sure there was no accidental connection between my adapter and pin 9 on the CPU board header. I would recommend anyone following my instructions do the same.