Texas Instruments TI-99/4A – 32k Internal Expansion Memory + Status LED + Reset.

Works that have been made:

32k Internal Expansion Memory.

Switch for disable the Expansion Memory.

Reset Pushbutton switch.

Bi-Color LEDs to display the status of the internal memory expansion 32k. (ON = Green / OFF = Red)

Replaced the resistor for the LED from 2.2k to 220 ohms.

Gallery of the works that have been made:

It could be better!

I had severals problems with the free space inside the TI-99/4a, i had to remove one side of the metal part, the biggest problem is the internal 32k expansion which is not very well done, there is no a way to secure it inside … but everything works perfectly :D