Jump to content

Photo

TI(ny)-99/4A Computer


130 replies to this topic

#76 fabrice montupet OFFLINE  

fabrice montupet

    Moonsweeper

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

Posted Sat Jan 27, 2018 5:04 AM

Thank you all ! :-)

That's done, the PCB is finalized. These last days, I worked on the optimization of the 4 layers routing, the density of the components (see below) prevent any automatic PCB routers to work well, so I had to manually re-work an important part of the traces design.

 

tiny994a_v2-comp2.gif

 

Maybe, wou have noticed a little logo near the name of the computer, it's a piece of coal.    Souvenirs...  :-)  

Updated picture of the motherboard (v2.6): http://www.ti99.com/...tiny994av26.jpg

 

The official web page: http://www.ti99.com/...8/tiny-99-4a-v2


Edited by fabrice montupet, Sat Jan 27, 2018 10:08 AM.


#77 Ksarul OFFLINE  

Ksarul

    River Patroller

  • 4,697 posts

Posted Sat Jan 27, 2018 1:57 PM

Most beautiful, Fabrice--and I definitely want one!  :) 



#78 ti99iuc ONLINE  

ti99iuc

    Stargunner

  • 1,483 posts
  • Location:Italy

Posted Sat Jan 27, 2018 2:24 PM

Yes Fabrice, i confirm my interest too.... it is a TIny Dream to have one of course... lovely <3 :) 



#79 Tursi ONLINE  

Tursi

    Quadrunner

  • 5,178 posts
  • HarmlessLion
  • Location:BUR

Posted Sat Jan 27, 2018 3:32 PM

Fantastic work, that is a thing of beauty. :)

#80 Opry99er OFFLINE  

Opry99er

    Quadrunner

  • 9,797 posts
  • Location:Hustisford, WI

Posted Sat Jan 27, 2018 4:18 PM

Lovely... a true revelation.

#81 eebuckeye OFFLINE  

eebuckeye

    Stargunner

  • 1,118 posts

Posted Sat Jan 27, 2018 4:44 PM

Beautiful...   really hope we can buy in the future!   :)


  • Odo likes this

#82 Vorticon OFFLINE  

Vorticon

    River Patroller

  • 3,229 posts
  • Location:Eagan, MN, USA

Posted Sun Jan 28, 2018 7:08 PM

Beautiful work Fabrice. Your site states that you will have a public offering on demand by the end of January. Is this still going to be the case? I would definitely be interested.

#83 Shift838 ONLINE  

Shift838

    River Patroller

  • 2,374 posts
  • SHIFT838
  • Location:Deer Park, Texas

Posted Sun Jan 28, 2018 7:13 PM

That is one great TI(ny) machine!  Great work Fabrice!


Edited by Shift838, Sun Jan 28, 2018 7:13 PM.


#84 Asmusr OFFLINE  

Asmusr

    River Patroller

  • 2,824 posts
  • Location:Denmark

Posted Mon Jan 29, 2018 12:42 PM

Yes this is a great looking machine. What type of monitor would you recommend?



#85 digdugnate OFFLINE  

digdugnate

    Stargunner

  • 1,558 posts

Posted Mon Jan 29, 2018 4:20 PM

put me on the eventual 'buy list' for sure.



#86 fabrizio OFFLINE  

fabrizio

    Space Invader

  • 14 posts
  • Location:ITALY ( Rieti )

Posted Thu Mar 1, 2018 9:50 AM

Great job ! bellissimo !

 

Only 4 layer ?


Edited by fabrizio, Thu Mar 1, 2018 9:51 AM.


#87 fabrice montupet OFFLINE  

fabrice montupet

    Moonsweeper

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

Posted Thu Mar 1, 2018 4:17 PM

Thank you :-)

Yes, 4 layers. The PCB is finalized since several weeks,  as I had to do some expenses (nothing to do with the retro computing) I also differed the PCB production by some weeks. I used (and use again) this waiting time to optimize the routing of each layers. It's a funny brain teaser.   The layers are defined as follows:

- Signal/power

- GND

- Signal

- Signal/power

 



#88 Schmitzi OFFLINE  

Schmitzi

    River Patroller

  • 4,336 posts
  • ToXiC
  • Location:Germany

Posted Fri Mar 2, 2018 9:52 AM

wow, really great work. ´love this



#89 oddemann OFFLINE  

oddemann

    Star Raider

  • 56 posts

Posted Fri Mar 2, 2018 12:47 PM

Thinking... What about making the PCB of the TiNY fit in a ATX tower!

Would be cool to have the "normal" tower for the TI and the then the space is not problem and there is a standard to make the electronic fit.

BUT, I love what your doing!

It looks so clean and... ohhh shit so desirable :P



#90 fabrice montupet OFFLINE  

fabrice montupet

    Moonsweeper

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

Posted Fri Mar 2, 2018 4:06 PM

Thank you  :-)

 

The PCB had to have screw holes, so I thought that as long as I place holes, I should place then respecting a standard. And ATX is the most common.

After that, the futurs acquirers will do as they like: Create their own case, use a Mini ATX case, use a modified PEB case or anything else :-)



#91 digdugnate OFFLINE  

digdugnate

    Stargunner

  • 1,558 posts

Posted Fri Mar 2, 2018 6:27 PM

sooo excited about these boards.  they look truly fantastic.



#92 BeeryMiller OFFLINE  

BeeryMiller

    Moonsweeper

  • 483 posts
  • Location:Campbellsburg, KY

Posted Thu May 31, 2018 1:15 PM

Thank you  :-)

 

The PCB had to have screw holes, so I thought that as long as I place holes, I should place then respecting a standard. And ATX is the most common.

After that, the futurs acquirers will do as they like: Create their own case, use a Mini ATX case, use a modified PEB case or anything else :-)

 

Fabrice,

 

What is the status of this project?  Will you be offering sales for interested individuals?  Hopefully assembled?

 

Thanks for any feedback.

Beery



#93 RickyDean OFFLINE  

RickyDean

    Dragonstomper

  • 892 posts

Posted Thu May 31, 2018 1:27 PM

BTW, Fabrice, this would make a lovely board to integrate a v9958 TIM style video upgrade, into ...hint...hint.. ;)



#94 fabrice montupet OFFLINE  

fabrice montupet

    Moonsweeper

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

Posted Sun Jun 3, 2018 7:47 AM

The Tiny-99/4A v2 is finalised since some days :-)
I'm working on realisation of the PCB of the extended keyboard.  Currently, I use the computer with my prototype keyboard (the one of the TIny-99/4A v1.0)

I would love to integrate the TIM VDP (I dream to own one) but I don't have the schematics and the code of it. In any case, I must have to creator's authorization.


Edited by fabrice montupet, Sun Jun 3, 2018 7:47 AM.


#95 RXB OFFLINE  

RXB

    River Patroller

  • 3,254 posts
  • Location:Vancouver, Washington, USA

Posted Sun Jun 3, 2018 1:16 PM

Does this support SAMS and TIM and GRAM device like PGRAM? 

 

OMG I will buy one even if I go broke doing it!


Edited by RXB, Sun Jun 3, 2018 1:16 PM.


#96 fabrice montupet OFFLINE  

fabrice montupet

    Moonsweeper

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

Posted Sun Jun 3, 2018 3:07 PM

The Tiny-99/4A v2 reacts as the original TI-99/4A, so it can receive a TIM device or a SAMS card.
For SAMS installation, I added a jumper to disable the onboard 32Kb expansion. At a time, I considered the integration of the SAMS device on the PCB but I made the choice a tiny PCB and there is already a very concentrated population of ICs on it (It's the reason why the PCB has 4 layers).  Adding the SAMS would have increase the size of the board. But as the computer has 3 expansion slots,  I said to myself that it was always possible to install the SAMS board if necessery. This is why I added the jumper to disable the onboard 32K RAM.

The computer integrates a extented 32 Kb ROM, it's a user ROM, so it can contains what one wants. (Currently, the v2 that I use contains Editor/Assembler II r2). This extra ROM is automaticly disable when a cartridge is plugged to prevent conflics.
There is a special case: To be compatible with the FinalGROM, I had to add jumpers that disable the extra ROM. This is not a real limitation because if someone has the FinalGROM, this 32Kb extra ROM has less interest.

The Tiny-99/4A v2 integrates a RTC based on the MM58167. So it will conflicts with the clock feature of the PGRAM.  I haven't  considered to disable the RTC on my computer, so there's no jumper. It's not a choice but a forgetting (whoops!) , But the traces of the control lines of the MM58167 are on the top and bottom layers of the 4 layers PCB. So, it's easy to disable the onboard RTC.



#97 ti99iuc ONLINE  

ti99iuc

    Stargunner

  • 1,483 posts
  • Location:Italy

Posted Sun Jun 3, 2018 3:12 PM

Wow, Fabrice it is very interesting and a nice job! I really like this project

#98 Ksarul OFFLINE  

Ksarul

    River Patroller

  • 4,697 posts

Posted Sun Jun 3, 2018 3:18 PM

Yes, Fabrice is a true hardware artist!  :) Très bon travail, mon ami!


Edited by Ksarul, Sun Jun 3, 2018 3:20 PM.


#99 RXB OFFLINE  

RXB

    River Patroller

  • 3,254 posts
  • Location:Vancouver, Washington, USA

Posted Sun Jun 3, 2018 5:01 PM

The Tiny-99/4A v2 reacts as the original TI-99/4A, so it can receive a TIM device or a SAMS card.
For SAMS installation, I added a jumper to disable the onboard 32Kb expansion. At a time, I considered the integration of the SAMS device on the PCB but I made the choice a tiny PCB and there is already a very concentrated population of ICs on it (It's the reason why the PCB has 4 layers).  Adding the SAMS would have increase the size of the board. But as the computer has 3 expansion slots,  I said to myself that it was always possible to install the SAMS board if necessery. This is why I added the jumper to disable the onboard 32K RAM.

The computer integrates a extented 32 Kb ROM, it's a user ROM, so it can contains what one wants. (Currently, the v2 that I use contains Editor/Assembler II r2). This extra ROM is automaticly disable when a cartridge is plugged to prevent conflics.
There is a special case: To be compatible with the FinalGROM, I had to add jumpers that disable the extra ROM. This is not a real limitation because if someone has the FinalGROM, this 32Kb extra ROM has less interest.

The Tiny-99/4A v2 integrates a RTC based on the MM58167. So it will conflicts with the clock feature of the PGRAM.  I haven't  considered to disable the RTC on my computer, so there's no jumper. It's not a choice but a forgetting (whoops!) , But the traces of the control lines of the MM58167 are on the top and bottom layers of the 4 layers PCB. So, it's easy to disable the onboard RTC.

 

Well like a REAL IRON TI99/4A I would like what I had originally:

 

SAMS, TIM and ability to write and load plus test GPL.

With this hardware I could make RXB into a 80 column in Editor mode, pump up the graphics to 4 times the number of pixels as 9918

and make good use of 1 or 4 or even 16 meg of SAMS RAM.



#100 fabrice montupet OFFLINE  

fabrice montupet

    Moonsweeper

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

Posted Sat Jul 14, 2018 7:46 AM

While the Tiny99/4A v2 computer is finalized, I get a sense of uncertainty about two onboard features:
- The 32Kb ROM expansion (that can contain user programs as Editor/Assembler, Disks manager or anything else) This ROM is automatically disable when a cartridge is plugged.
- The 32kb expansion RAM
I notice that fhe first feature has less interest since the recently arrival of the excellent FinalGROM.
I wonder if the second feature is enough for the newer software.

Maybe, my doubts are unjustified? In fact, I am thinking about a feature that could replace the ROM/RAM expansion with the SAMS, maybe more useful. But before, I have to ask two questions:
- What a SAMS 1MB/4MB feature support would bring today, in 2018?
- Will the SAMS be substantially used in newer software?

The removing all the circuitry of the two actual features is not quite enough to leave room for the SAMS one. The components integration of the motherboard is already a lot condensed but I think that I will be able to load the additional components. A solution would be to add a special slot for the memory banks. The low profile memory card could support 1MB or 4MB configuration).

Should I maintain the computer in its actual stage? Should I modify it to integrate SAMS? What is your point of view about it?
Thank you :-)
 






0 user(s) are browsing this forum

0 members, 0 guests, 0 anonymous users