The TI-99/4A Super Cart was one of those things Texas Instruments 'SHOULD' have made back in the day, but didn't. So what exactly is a Super Cart and why did we all want one?
The Super Cartridge is basically an Editor/Assembler cartridge with an additional 8K of RAM that gave us some additional utility, flexibility and ease of use. Some examples:
1) With the ability to store a configurable menu system (like Quikload), we no longer needed to load one program just to load another program. It was a great time saver as it was always right in memory ready to go. If you got a new program, you just updated the menu.
2) (My favorite) was the ability to run 4A DOS.
Interestingly, with the advent of the new FlashROM 99 and FinalGROM99 4A DOS has made a resurgence, but will probably be supplanted with the new Force Command DOS by Jedimat42.
There are multiple methods for building a Super Cart.
Instructions on the old way to build an 8K Super Cart are at the Mainbyte site:
There is also a 4 bank version (which I never had) :
NOTE: You'll also need a double sided 'donor cartridge' like a TI-Invaders or Munchman
If you are unable to make one yourself, keep an eye out on eBay, they've been known to show up from time to time. Better yet, ask in the TI section here on Atari Age, someone may be willing to build one for you.
THE NEW METHOD
(Better in my opinion)
By clicking <<HERE>> you can buy a new, modern and ready to go PCB . Of course you'll still need to acquire an old Editor/Assembler module to get the required GROM chip.