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sparkdrummer

ZENOBOARD

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post-41593-0-79983900-1443802752_thumb.jpgpost-41593-0-96504900-1443802751_thumb.jpgYou know I was examining my unfinished zeno boards last night and I believe that it would be possible to either shoehorn the components onboard or to attach the ubergrom as a daughter board and still mount it into the console on top or underneath the Zeno and attached to it. There is still plenty of unpopulated real estate on the board and some can be worked around. Would regular cartridges still work with the ubergrom attached in this manner?

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...was examining my unfinished zeno boards

 

You have multiples? NICE!

This was a great concept for the TI BITD, even more today I think.

 

It just so beautiful, it's too bad it's hidden in the console.

gallery_35324_1027_268468.jpg

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Would regular cartridges still work with the ubergrom attached in this manner?

 

Probably not, it would answer to any cartridge space GROM requests, causing conflicts. I always toyed with the idea of a version that read the cartridge port and turned itself off automatically, but I haven't had time to build anything for a while now.

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How about a switch, to turn off the ubergrom when using another cartridge, (though I would wonder why, with all the goodies in ubergrom), but possible?

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Yep, that's easy. Put it on the *GSEL line (when 'off' the line to the chip should pull up through a 10k resistor to +5v) and the chip will not respond to any requests. (This is pin 24 on the AVR.)

Edited by Tursi

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Ok, sounds like it will work. When I get a little extra cash to spend, I will buy a ubergrom kit and see where it takes me. Thanks Tursi, Ricky.

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I am Noob. That being established, the Zenoboard looks like a solution for (as was previously mentioned), saving space. Is there a working version? the notes state that there was a single trace line where a fault existed but should be easy to overcome. This looks like a very fun project to undertake. 

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One of these days I’m going to see if I can talk somebody into building mine up all the way and installing it in one of my spare consoles. Probably a beige one. 

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2 hours ago, Mehridian Sanders said:

I am Noob. That being established, the Zenoboard looks like a solution for (as was previously mentioned), saving space. Is there a working version? the notes state that there was a single trace line where a fault existed but should be easy to overcome. This looks like a very fun project to undertake. 

The board hasn't been produced in 25 years or so. A few of us have boards from the original run, but that's pretty much it.

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18 on the die, with a +7 initiative bonus (roll modified to 25) and bastard sword in hand. . .muahhhhhh!

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I see spots for what I think are TI GROM chips, what are the larger sockets for?  

I can imagine an "updated" version of this someday as "FinalGROM plus"

 

gallery_35324_1027_268468.jpg

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The board has spaces on it for the TI Extended BASIC chips and for the Speech Synthesizer chips. Some of those are obviously larger than the GROM chips. Probably the biggest issue I have with this board is that there are two places that run a pair of traces between two of the chip pads. That is some tight spacing when you want to avoid accidental shorts. I looked at respinning this board at one point, but I never took the project that far.

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You know what's even more rare then a Zeno board?  One that's actually in a console and working. I knew when I saw one it was way above my pay grade. So I had one of the guys in the Hugger U.G. build it for me. He had 30 years of experience as an electronics tech and an electronics hobbyist.. He was really good and said it was the most difficult board he ever worked on. Amongst the problems, mounting, no solder masks, small traces, super small pads.

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hmm if I am looking at this correctly it shoots off the cart slot. Why would you do this? Wouldn't it be more effective to utilize the sidecar port? oh wait ... adding XB to it would be the reason. Hmm.. so .. then the Cart slot connects the speech and the 32k Ram as well? Wow that seems .. highly complicated.

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From the book - rework... More working and less talking! 😃

In addition to all the other mounting issues, most of the working ones have a rotary knob at the top of the console   that selects the module.

I think most people gave up and had John Wilforth from the PA UG build it for them.

Which is why I think he quit the TI hobby to never be heard from again.....

 

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