Jump to content


TI(ny)-99/4A Computer

48 replies to this topic

#26 timofonic OFFLINE  


    Star Raider

  • 92 posts

Posted Wed Jun 14, 2017 5:05 AM

What EDA software have you used? Do you plan to release the design files on a place such as GitHub? It would be interesting for people into electronics, even modifying it to "break" the 1983 rule (replacing memory chips with higher density ones, using CPLD or FPGA, integrate updates, convert it into a Geneva, etc).

Edited by timofonic, Wed Jun 14, 2017 5:06 AM.

#27 barry.peterson ONLINE  


    Space Invader

  • 35 posts
  • Location:Cary, North Carolina

Posted Wed Jun 14, 2017 6:04 AM

I also would buy one in a heartbeat!


#28 JonnyBritish OFFLINE  



  • 419 posts
  • Location:Montgomery, IL

Posted Wed Jun 14, 2017 7:34 AM



Amazing to see this. You could almost imagine a bunch of other retro consoles done in same way ie VCR style so you could stack them


Great work!

#29 PeBo OFFLINE  



  • 885 posts
  • Location:Toronto, Canada

Posted Wed Jun 14, 2017 11:26 AM

Fabrice, As always, your custom builds are stunning creations. This one is no exception. In fact this one sets a new level.


You have more imagination and talent in you baby finger, than most of us have in our whole hand (in our whole bodies to be honest)


I stand in awe.


Absolument incroyable Monsieur Montupet!



Oh and I used edit to add this:

Does this mean I can have your modded beige console now????? (SVP!!!)

Edited by PeBo, Wed Jun 14, 2017 11:48 AM.

#30 chue OFFLINE  


    Chopper Commander

  • 134 posts

Posted Wed Jun 14, 2017 11:41 AM

Like the others I too am in awe of this project!  Just one question though... which side is the coffee warmer on  ;) ?

#31 fabrice montupet OFFLINE  

fabrice montupet

    Chopper Commander

  • Topic Starter
  • 186 posts
  • Location:Burgundy - France

Posted Wed Jun 14, 2017 3:27 PM

Thank you all of you very much for your kind words ! I'm happy to see that this TI(ny)99/4A is appreciated :-)

@Rasmus: The v1.0 TI(ny)99/4A is design for PAL TMS9929A VDP so, at this stage of the developpment, it is not really compatible with the TMS-9928A: their color table are different. So, by installing a 9928A you'll get a picture but wrong colors.
But a 9928A compatiblity is an interesting future option to add to the motherboard.
@--- Ω --- : The jumper you see is for I/O data bus control, not for disabling the 32kb expansion RAM, but it is easy to disable the 32Kb to be able to use a SAM :-)
@timofonic: I used Diptrace. At this time, I am not planning to put the file on GitHub or equivalent.
@PeBo: With this TI(ny)99/4A my modded TI-99/4A suddenly gotten old ! That said, I think that I will still  keep it a bit. But it is quite possible that I will part with it one day.
@Chue: A coffee warmer, this is a great improvement to add to it ^^

#32 apersson850 OFFLINE  



  • 417 posts

Posted Wed Jun 14, 2017 4:52 PM

You do know that "coffee warmer" is the common phrase for the hot area below the cartridge port in a standard TI 99/4A, don't you?

It's funny that in Swedish, TI(ny) reads like TI(new), and this is really new in spite of being old, if you get my drift.

#33 acadiel OFFLINE  



  • 927 posts
  • www.hexbus.com
  • Location:USA

Posted Wed Jun 14, 2017 5:28 PM

<Jaw drops.> Wow. Amazing.

#34 matthew180 OFFLINE  


    River Patroller

  • 2,383 posts
  • Location:Castaic, California

Posted Thu Jun 15, 2017 1:12 AM

Oh cool, you used DipTrace.  I went through a big electronics designs software review/decision making process a while ago and DipTrace was very high on my list.  I almost bought it, but Altium had just released CircuitMaker so I decided to try that first.  Needless to say I'm still using CircuitMaker and really like it.


How do you like DipTrace?  Are you happy with the software after doing a large project like this?

#35 samishal OFFLINE  


    Star Raider

  • 60 posts

Posted Thu Jun 15, 2017 4:22 AM

Holy crap! Fabrice this is incredible, I'd love to build one of these myself, very nicely done!

#36 JamesD OFFLINE  



  • 7,572 posts
  • Location:Flyover State

Posted Thu Jun 15, 2017 10:05 AM

If you think about it, this is almost a miniture version of TI's mini-computers.  A mini-mini if you will.
Ya know, TI probably would have been much better off making a design like this and charging $1000+ for it.

#37 F.G. Kaal OFFLINE  

F.G. Kaal

    Space Invader

  • 29 posts

Posted Thu Jun 15, 2017 11:10 AM

Beautiful design. Great job. I like it.

#38 x24b OFFLINE  


    Star Raider

  • 68 posts
  • Location:Apple Valley, CA

Posted Thu Jun 22, 2017 1:09 PM

Amazing, fantastic, wonderful... wish I could build one. Truly an original take on the 994A system layout.

#39 fabrice montupet OFFLINE  

fabrice montupet

    Chopper Commander

  • Topic Starter
  • 186 posts
  • Location:Burgundy - France

Posted Sun Sep 10, 2017 3:43 PM

Thank you all!  :)


Since my new job, I am not much available. But, I would like to show you the extended keyboard I made for the TI(ny)-99/4A:


Here is, too,  a view to the second motherboard I made:

Edited by fabrice montupet, Sun Sep 10, 2017 3:47 PM.

#40 Ksarul OFFLINE  


    River Patroller

  • 4,126 posts

Posted Sun Sep 10, 2017 5:58 PM

That is a real thing of beauty, Fabrice! Je suis enchantée!

#41 mmartin OFFLINE  


    Space Invader

  • 13 posts
  • Location:Lanus,Buenos Aires,Argentina

Posted Sun Sep 10, 2017 8:03 PM

really exellent !! the keyboard is amazing ...an the motherboard impress to me congratulations fabrice!!  

#42 Sinphaltimus OFFLINE  



  • 1,920 posts
  • Distracted at the Keyboard
  • Location:Poconos, PA

Posted Mon Sep 11, 2017 6:27 AM

You are just chock full of surprises at every turn. Wow.

#43 BJGuillot OFFLINE  


    Star Raider

  • 52 posts

Posted Thu Sep 14, 2017 9:11 PM

Wow. This is really nice!

#44 fabrice montupet OFFLINE  

fabrice montupet

    Chopper Commander

  • Topic Starter
  • 186 posts
  • Location:Burgundy - France

Posted Sun Sep 17, 2017 5:44 PM

Thank you :')

A new video, showing an expansion card in action: the PHP1240 floppy disk controller:




  • 307 posts
  • Location:The Great White North

Posted Sun Sep 17, 2017 6:05 PM

C'est manifique Fabrice.



#46 jedimatt42 OFFLINE  



  • 1,208 posts
  • Location:Beaverton, OR

Posted Mon Sep 18, 2017 12:23 AM

Reminds me of the GR8BIT computer...

All vintage chips. I love it! Getting the classic PEB port in there for compatible expansion is truly awesome!

Looking forward to seeing where you take it. This truly shows passion for the TI!


#47 oddemann OFFLINE  


    Space Invader

  • 15 posts

Posted Mon Sep 18, 2017 6:23 AM


Me like!

So cool that you put "everything" into a box.

I am pretty sure you would sell a few of them if you wanted. Pretty sure you would sell a lot if you made "modern" fix on that design. Like someone said, more ram, memory card options, HDMI. I think that a "gamer" like that would have a good platform to have more stuff created on it. Like "The second coming" :P hehehe Even I would want to buy it and share old memory's with my kid. Power on and your ready to play games - Very hard to resist ;)

One thing is for sure - It is great, cool design and so cleanly executed.

#48 LASooner OFFLINE  


    Chopper Commander

  • 134 posts

Posted Mon Sep 18, 2017 5:06 PM

Is there going to be thermal issues with such a compact design and old components?

#49 speccery OFFLINE  


    Chopper Commander

  • 210 posts

Posted Yesterday, 12:54 AM

What a thing of beauty, really amazing work Fabrice! Like it was said earlier in this thread, this build really raises the bar.


..and makes me wonder if for the next project I should go more retro and just use components from the day. I did not yet look at this closely but will do so later, just curious on what type of memory chips you used from RAM and ROM?

0 user(s) are browsing this forum

0 members, 0 guests, 0 anonymous users