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Latest Updates

Floppy Days Podcast - TI99 History Episode
Randy Kindig, host of the vintage computing podcast Floppy Days, has spoken with several of us for a series of planned episodes about TI-99 computers. The first show is out now - Randy interviews Jim Fetzner and Mark Wills about the history of the computers. It's a great listen, so check it out: Floppy Days Podcast -TI-99/4A History
Posted on Nov 21 2015 by Rich
CC40 Updates and Scans
The CC40 Page has been updated, and some document scans have been added:

-The 'Guide to Programming the CC40' referenced on the CC40 page had been scanned and is available as a PDF.
-The CC40 User's Guide that has been available as a download for some time now has been cleaned up quite a bit. Each PDF page used to have two facing pages from the guide, but they have now been split so that each page from the book is now on a separate PDF page. Pages have been rotated 90 degrees clockwise and also de-skewed so that they can be read more easily on a computer screen, and I also cleaned up the pages quite a bit by removing specks and other junk.

Links to download the PDFs can be found on the CC40 page, or you can find them in the book/manual sections of the 99er Download Database.

Posted on Jul 13 2015 by Rich
Miniature 3D Printed TI-99/4A
Rabbit EngineeirngRabbit Engineering makes these awesome miniature TI-994/A consoles on a 3D printer. If you're lucky enough to have a 3D printer, you can download the files to make your own. If not, you can follow the link to their Etsy store and buy one that's all painted and ready.

Rabbit Engineering on Thingverse

Posted on Apr 23 2015 by Rich
TI-99 Database / File Dump
I've started building a database of TI99 hardware, software and literature. You can read a little more about it in the forum, and you can check it out at:

I've created a sort of 'file dump' at as a place to quickly upload files before I get around to adding them to the regular download section with a full description, file info, etc. The file dump has minimal descriptions (if any), but the filenames should give you an idea of what they are. Right now, it's all manual scans in pdf, and Win994a floppy images. The images in the 'Micropendium' directory are all disks that I received from John Kohler of Micropendium after the magazine shut down. The file dump can be found at :

Posted on Mar 11 2015 by Rich
New TI99 Newsletter - Shift838
There is a new newsletter out for the TI-99 from Chris Schneider. Visit his Shift838 website to sign up, and download a PDF copy of the first newsletter from the WHTECH FTP site.
Posted on Jan 18 2015 by Rich
Droid99 - New TI-99 Emulator For Android
There is finally a TI-99/4A emulator available for Android phones. You can download it from the Google Play store so that you can carry the TI around with you wherever you go. It comes with a number of cartridges ready to use, and you can also load ROM and disk images if you want to. Check back soon - I'm working on a short review, but so far, I'm really impressed!
Posted on Oct 13 2014 by Rich
New Cartridge - Extended Basic v2.7 Suite

A new cartridge has been produced by a group of TI'ers. It's been in limited production, but more are promised to be coming soon. The cartridge replaces TI Extended Basic, and the TI Editor Assembler. It also includes a list of utilities as well as games. Read more about it and download the documentation:

Extended Basic v2.7 Suite Blog

Posted on Sep 17 2014 by Rich
The TI-Pi A Raspberry Pi powered TI-99/4A

The guys over at The Circuit Surfers have created a cool 'Raspberry PI In A TI99 Case' project complete with LED lighting. Read more about it on the Make Magazine site:

Posted on Aug 22 2014 by Rich
3 in 1 Rasmus Cartridges Now Availalable
New 3 in 1 scrolling games from Rasmus are now available. The games on the cart are Road Hunter, TI Scramble, and Titanium. Initially, a limited run had been done, but they are now in stock, and you can order one from: Arcade Shopper
Posted on Aug 21 2014 by Rich
New Forums
The new message boards are up and running at:
On the old message board, I had to have to approve each registration in an effort to prevent spam bots. On the new board, you just register, verify your email, and you'll be all set to post. No need to wait for me to approve it.
Posted on Apr 16 2014 by Rich
RaspTI: Convert a Vintage Computer (TI-99/4A) into a RaspPi Workstation
Matthew Epler created an Instructable documenting his project of turning a TI-99 console into a Raspberry Pi workstation. On the one hand, I hate to see a TI pulled apart and used only for the shell. On the other hand, I find the project interesting because in part 1, Matthew shows how to interface the TI keyboard to the microcontroller. Actually, I\\\'m not sure if the other parts of this project are going to be finished since part 1 looks like it may be at least 11 months old.

Here\\\'s the link:

Posted on Jan 26 2014 by Rich
Running The TI-99/4a In Your Web Browser (with MESS)
A group working on a port of MESS " (Multi Emulator Super System) has a beta version available that definitely worked for me using the Chrome browser. Others may be functional as well. The Javascript MESS project site allows you to try out different supported systems. The TI-99/4a is one of those systems, and you are able to choose the cartridge that you want to run from the drop-down list at the top of the screen. You then start the system up by pressing the space bar.
Posted on Sep 03 2013 by Rich
New Version of the Win994a Simulator - 3.010
Cory Burr has released a new version of his TI-99/4a simulator for Windows. This update consists mostly of some technical modifications including the X cpu opcode being modified so that it functions correctly, the preferences dialog now has a fast 16bit access 32K Extended Memory option, and the assembler application has been updated. Download on the Win994a Downloads Page.
Posted on Apr 02 2013 by Rich
New Version of V9T9 Emulator
Many years ago, Ed Swartz released the final version of his TI-99/4A emulator, V9T9. That version ran from the command line in DOS or in Windows with a front end. A month or so ago, Ed released his latest public version. It's written in Java, and can therefore be run on many different machines. The interface is very polished and even supports drag and drop cartridges! You can download the new version from Ed's website at If you're interested in the old version, you can still download it from this site in the download database.
Posted on Mar 28 2013 by Rich
New Manuals, Win994a Disk Images and Videos
I've added a number of new files to the download database.

-Several more of my imaged floppy disks uploaded to /Win994a/Disks
-A scan of a Triton catalog uploaded to /Books, Magazines, Catalogs, Newsletters, Articles/Catalogs
-A scan of an adventure hint book uploaded to /Books, Magazines, Catalogs, Newsletters, Articles/Books
-Several new scans of game manuals uploaded to /Manuals/Games
-Some TI-99/4a, Speak & Spell and Dataman commercial videos uploaded to /Media
Posted on Mar 03 2011 by RichP
FC5025 5.25" Floppy Controller
I purchased a FC5025 controller from Device Side Data, and have been using it to convert all of my old TI-99/4A 5.25 floppy disks over to Win994a format.

The FC5025 connects between your 5.25" drive and your PC via USB. The included software can read several vintage computer formats including the TI-99/4A. You then use it to make a disk image that is compatible with the V9T9 emulator (which is the same as the Win994a disk image- just change the extension to 'TIDisk').

The whole process is pretty seamless and takes only few seconds per disk. It's the easiest way I've found to convert them.

I have begun converting my collection of disks, and uploading them to the Win994a disk section of the download database. Check back for new additions.
Posted on Feb 19 2011 by RichP

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