838-IO Plus PREORDER has ended

This is a preorder only. Preorders will be closed on May 1, 2022 @ 9:00 a.m. CST.

Boards and parts will be ordered on May 2, 2022 and will take around 2 weeks to be received.

Orders will be filled based on order number. (first in, first out).

Demonstration Video: https://youtu.be/g6bb5DK2shI

All cards will be tested before being shipped on the below TI-99/4A test system:

• TI-99/4A
• 32K CARD
• FDC
• TIPI
• IDE Hard Disk Controller
• 838-Speech

This unit replaces the original Texas Instruments Flex Cable Interface card.

This replacement removes the firehose type cable and elephant foot connector that plugs into the 99/4A console side port with a vertical standing interface utilizing a DB37 twisted paired cable that plugs in from the back to reduce desk real estate.

Allows for expansion within the side port connector with an optional 32k expansion card to free up an extra slot on the PEB. Additional expansion cards are currently in design mode.

• 3D case not included but can be added to order. Please allow one day to print
  • Case Option #1 : Standard Case smooth, no racing edges (like racing stripes) - All black Case with printed identification labels
  • Case Option #2 : Standard Case with Racing Edge cuts (all black case) with printed identification labels
• Cable not included, must be added as option.
• 32K expansion module not included must be added as option.

I have verified cables will work with 3, 4, 4.5 and 5 foot lengths in a twisted pair configuration. If you elect not to purchase the cable from me please let me know so I can provide you the wiring diagram and what type of cable to buy.

Standard off the shelf molded DB37 cables will not work longer than about 3 feet.

If you want to print your own 3D case I can provide the STL files for printing, just get in touch with me.