Jump to content

Photo

TI(ny)-99/4A Computer


144 replies to this topic

#126 RXB OFFLINE  

RXB

    River Patroller

  • 3,303 posts
  • Location:Vancouver, Washington, USA

Posted Sat Aug 4, 2018 9:38 AM

Personally I would dump TI Basic for the simple reason instead to increase the extra 16K GROM to be 24K of OS in GPL and 8K ROM.

i.e. GROM 0 (current OS), GROM 1 (currently TI BASIC), and GROM 2 (currently TI BASIC) also of course ROM 0 (Assembly OS)

 

RXB can run 99% of TI Basic programs especially if you put my REA TI Basic support routines there at that GROM space (4K used),

the computer does not know the difference between a CALL LINK called by TI Basic or XB, how they are handled in Assembly are the 

same. And with 12K of added OS GROM a better memory manager could be created to take advantage of the SAMS memory. Not to

mention a F18 MK2 VDP memory manager also.

 

So your board would be able to be the most advanced TI on a single board.



#127 fabrice montupet OFFLINE  

fabrice montupet

    Moonsweeper

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

Posted Sun Aug 5, 2018 3:37 PM

You mean that I should remove TI-Basic and replace it with RXB? It is a pretty good idea, I like RXB very much. Can you tell me the way to do?

 

That's done, I succeed to reintegrate the third expansion slot :)



#128 RXB OFFLINE  

RXB

    River Patroller

  • 3,303 posts
  • Location:Vancouver, Washington, USA

Posted Sun Aug 5, 2018 4:57 PM

You mean that I should remove TI-Basic and replace it with RXB? It is a pretty good idea, I like RXB very much. Can you tell me the way to do?

 

That's done, I succeed to reintegrate the third expansion slot :)

No I said I have written Editor Assembly support that goes into where TI Basic Resides taking less than 4K space, and TI Basic currently takes 12K of the 16K space available.

 

This leaves 12K of open spaces when TI Basic is removed.

 

On a side note RXB can run 99% of TI Basic routines, and STANDARD XB CALL LINK will run those same LINKS but no TI Basic as XB does not support characters 144 to 159,

which RXB does.

 

Just socket TI Basic chips so can be replaced, in the future. (After RXB 2018 I am working on a upgrade to TI GPL OS)



#129 fabrice montupet OFFLINE  

fabrice montupet

    Moonsweeper

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

Posted Sun Aug 5, 2018 5:17 PM

Ok,  now I understand better what you said, I"m french and sometimes it can happen to me to have some difficulties to understand exactly some sentences.
All the IC are socketed, so upgrades are made easy.



#130 BeeryMiller OFFLINE  

BeeryMiller

    Dragonstomper

  • 577 posts
  • Location:Campbellsburg, KY

Posted Thu Aug 9, 2018 9:38 AM

Fabrice,

 

Will your TI(ny) Computer be available for purchase?  Or, is it more of just a personal project of your own?

 

Beery



#131 fabrice montupet OFFLINE  

fabrice montupet

    Moonsweeper

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

Posted Thu Aug 9, 2018 5:02 PM

At the beginning, it was just a personal project for fun. But, as some of you were interested to get one, I have modified it for TMS9918A support (and not only the TMS9929A), it will be available for purchase.

 



#132 fabrice montupet OFFLINE  

fabrice montupet

    Moonsweeper

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

Posted Sun Sep 9, 2018 2:08 PM

I introduce you the microcomputer TIny-99 / 4A version 2.3
This project, following the TIny-99/4A v1 project, brings several modifications and improvements. Starting with a significant reduction in the size of the motherboard. It measures 25.1cm x 21.6 cm, a small size considering the number of embedded components.
The micro-computer, still architectured around the TMS-9900 now has more memory. In addition to the 32KB memory expansion it adds 1MB of SAMS RAM memory, which can be extended to 4MB. Other new features: the Real Time Clock and two additional expansion slots which now increase to 3 the number of cards that can be plugged to the motherboard. The very first TIny-99/4A initially used the VDP TMS-9929A, now it can also receive a TMS-9918A (NTSC version). Some other details will be presented soon.

Here is a picture of the first assembled motherboard of TIny-99/4A v2.3:
For information, the motherboard is on 4 layers and represents nearly 400 components for a total of 2284 pins.

Note: The small card (that only contains the 2 SAMS SRAM chips) that goes to the RAM expansion slot (near the 74LS612) not appears on the picture. I will take one soon)

tiny994av23-top-us.jpg



#133 Shift838 OFFLINE  

Shift838

    River Patroller

  • 2,412 posts
  • SHIFT838
  • Location:Deer Park, Texas

Posted Sun Sep 9, 2018 3:43 PM

That a thing of beauty right there! Nice job Fabrice!



#134 digdugnate OFFLINE  

digdugnate

    Stargunner

  • 1,670 posts

Posted Sun Sep 9, 2018 4:14 PM

i am in awe. so cool!



#135 pjduplooy ONLINE  

pjduplooy

    Chopper Commander

  • 102 posts

Posted Sun Sep 9, 2018 11:53 PM

Now THAT is a thing of beauty Fabrice!!!

 

I soooo want one.

 

Do we have AtariAge on the Dark Web, where payment is accepted in bodyparts?  (Just kidding).

 

Awesome work



#136 ti99iuc OFFLINE  

ti99iuc

    Stargunner

  • 1,497 posts
  • Location:Italy

Posted Mon Sep 10, 2018 12:15 AM

Yeah, it is fantastic, great job Fabrice, wow

#137 RickyDean OFFLINE  

RickyDean

    Dragonstomper

  • 923 posts

Posted Mon Sep 10, 2018 6:18 AM

Looks just right to me.  ;)  :grin:



#138 Bill Loguidice OFFLINE  

Bill Loguidice

    Quadrunner

  • 6,782 posts
  • Armchair Arcade Managing Director
  • Location:Burlington, New Jersey, USA

Posted Mon Sep 10, 2018 10:14 AM

This is fantastic. You know, I gave up my entire TI-99/4a collection, but I'd certainly be interested in one of these if it ever became available to purchase.



#139 aftyde OFFLINE  

aftyde

    Chopper Commander

  • 240 posts

Posted Thu Sep 13, 2018 2:37 AM

Incredible - I would definitely be interested in buying.



#140 gillespieatari OFFLINE  

gillespieatari

    Combat Commando

  • 2 posts

Posted Thu Sep 13, 2018 4:22 AM

Very nice project. I would be interested in buying one.

#141 chue OFFLINE  

chue

    Moonsweeper

  • 274 posts

Posted Thu Sep 13, 2018 4:30 PM

TI(ny) writeup on HackADay:

 

https://hackaday.com...n-the-ti-99-4a/



#142 Shift838 OFFLINE  

Shift838

    River Patroller

  • 2,412 posts
  • SHIFT838
  • Location:Deer Park, Texas

Posted Thu Sep 13, 2018 7:13 PM

Is there an estimated price as of yet?



#143 fabrice montupet OFFLINE  

fabrice montupet

    Moonsweeper

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

Posted Sat Sep 15, 2018 2:03 PM

I'm sorry about the delay of my answer, I was very busy these last days.
Thanks to all of you and your kind messages :-)
I still haven't calculate the price, I will tell you more next days.

 



#144 Ksarul OFFLINE  

Ksarul

    River Patroller

  • 4,741 posts

Posted Sat Sep 15, 2018 2:14 PM

Thank you, Fabrice!  :)  :)  This is beautiful and I really must add one to my collection once they are available!  :)  :)



#145 digdugnate OFFLINE  

digdugnate

    Stargunner

  • 1,670 posts

Posted Mon Sep 17, 2018 10:29 AM

definitely following for the price announcement :)  that is such a fabulous labor of love.






0 user(s) are browsing this forum

0 members, 0 guests, 0 anonymous users