The TI-99 Upgrade/Projects Page

Page Last Updated: 4/15/2005

Below you will find several "Projects" for the TI-99, the Geneve, and other related hardware items. More will be added in the future.

I wish to thank John Creviston Jr. for all his advice, supplies, and hard work in helping me to put these projects together. Without his help this project web site would not have happend.



I have done my best to give credit where credit is due. If you see something on here that you feel needs proper credit applied please contact me..

Thanks.. Ron


Flex Card Tune Up

Speed up the I/O on the Flex Card.



32K on the 16 bus KIT

This is a great kit which adds 32K in the console on the 16 bit bus.



Assorted Cables

This shows how to wire up different cables used the the TI-99



Joy Talk is Cheap

This is a project to build a low cost RS232 interface which does not require a PEB.



Thierry Nouspikel's IDE Card

A quick view of the IDE Card, and some links for more information.



TI Hardware Schematics

A collection of TI hardware schematics; Disk controller, RS232, Peb Box among many others.



Zeno Board Schematics

Information on the Zeno Board.



PEB 12 volt 2 Amp Power Upgrade/Fuse Replacement

This projects shows how to increase the 12 volt 1 amp supply to a 2 amp one. It also shows how to replace the PEB's fuse.



8K SuperCart

This project adds 8K of battery-backed RAM to the Editor/Assembler module. In effect, this means you can write your own 8K battery-backed command module software.



4 Bank 8K SuperCart



This project adds 4 Banks of 8K, battery-backed RAM to the Editor/Assembler module. In effect, this means you can write 4 Banks of your own 8K battery-backed command module software.



80 track Upgrade Kit

This upgrade kit for the standard TI disk controller card allows 80 track drives to be used, such as a 3 1/2" 80 track floppy. The modified code supports 40 and 80 tracks for SSSD and 80 tracks for DSSD, but not 40 DSSD



Use 2 RS232 Cards in PEB

This project will allow you to use 2 different RS232 cards in your PEB at the same time giving you 4 serial ports and 2 PIO ports.



USB/SM Card

Thierry Nouspikel has designed and built a USB-Smart Media PEB card which he is sharing with the TI Community. This card will allow USB devices to be attached to the TI.



Mini Memory Module
Battery Replacement

Give your Mini Memory module many more years of life by replacing a dead battery.



Geneve 9640
Battery Replacement

The battery on a Geneve should last 3-5 years, but eventually you will need to replace it, especially since they are all older than that!



TI Command Module / Console Port
Disassembly Maintenance / Repair

Dirty contacts can cause lockups, screen garbage and other annoying problems. Cleaning module contacts is a quick and easy job



Alpha Lock / Joystick Fix

With this project completed you will never need to worry about the alpha-lock key being up or down when you are using joysticks.



TI-99/4A Console Disassembly

This project shows how to disassemble the console just "for the fun of it" or for other modifications.



Clearer Display (Capacitor Fix)

Clearer Display (Resistor Fix)

These projects will help clear up the screen display. It seems to me that the capacitor fix does more "fixing".



PEB Disassembly and "Quiet" Fan Installation

See how to take the PEB apart, and quiet it down at the same time.



2 Half Height Drives in PEB

This project will show you how to add 2 half height drives to your PEB.



Blue LED's in PEB

This is a project that is just for fun, give your PEB the "Blues"!



Atari Joystick Adapter

This adapter will allow you use Atari joysticks with the TI



Speech in Console

Let your TI talk without any visible means of speech!



Speech in PEB

Let your TI talk without any visible means of speech!



TI-99/4A Console Speedup

This project will speedup your console by 20%!



Geneve 32K SRAM Upgrade

Add 32K of SRAM to your Geneve which allows you to run MDOS 6.0.



Horizon 32K Mod to
Replace PE-Box 32K Card

This project will allow you to add 32K of expansion RAM to the 2000 series Horizon Ramdisk.



Add 32K on 16bit Bus in Console

This project adds 32k of expansion RAM to the 16 bit bus in the console, and is in three parts.

Speed Test for this upgrade

PART 1:
Add 32K on 16bit Bus in Console


PART 2:
Bypassing the 32/16-Bit Memory
Conversion Wait State Defeat


PART 3:
Add LED's for RAM Access


Pictures of my custom console