Opinions on replacement 5101 ram williams chip

kuglerarcade

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i know these chips are out dated and hard to find.well mine to a crap in my jungle lord.i did find a replacement SIMTEK 12C68 from pin-logic has any one installed one and what do you think thanks
 
i know these chips are out dated and hard to find.well mine to a crap in my jungle lord.i did find a replacement SIMTEK 12C68 from pin-logic has any one installed one and what do you think thanks

I build/sell these too. Great option (IMO). The product that Tom (pinlogic) sells work perfectly.
 
i know these chips are out dated and hard to find.well mine to a crap in my jungle lord.i did find a replacement SIMTEK 12C68 from pin-logic has any one installed one and what do you think thanks

It depends on the exact board that the adapter is working in.
The 5101 has two chip enables but the adapter mentioned only supports one.
Wms (as you mentioned), Bally & Stern - you should be ok as these only use the one chip enable for memory decoding. The second chip enable is used for powerup/powerdown which is handled internally to the Simtek part.

Gottliebs, on the otherhand, will not work properly with these modules. These require both chip enables for memory decoding.

Ed
 
The boards I made can be set up to use both enables, but since most people buy them for defender & williams pins, I normally just jumper over the logic.
 
The boards I made can be set up to use both enables, but since most people buy them for defender & williams pins, I normally just jumper over the logic.

That sounds cool. If someone were to PM you would you have these available? I don't need one but I'm sure some do.
 
The boards I made can be set up to use both enables, but since most people buy them for defender & williams pins, I normally just jumper over the logic.

I have a module that does that as well. It has a few surface mount FET's under the socket to combine the two CE's into one. I used discrete FET's to keep the power low - but if you use a SIMTEK or similar, this shouldn't matter. Is this similar to what you did?

Ed
 
i know these chips are out dated and hard to find.well mine to a crap in my jungle lord.i did find a replacement SIMTEK 12C68 from pin-logic has any one installed one and what do you think thanks
I don't think the 5101 is hard to find. I just bought a couple from Marco specialty.
Glennon
 
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