board color may vary

HDX PC Board for use with a TI-99/4a RS232 Card (only Texas Instruments cards will work)

Adds "network like" functionality with the HDX software from Fred Kaal

Manufactured with permission and sold for cost + $5 shipping and packaging to US addresses.

If you are outside of the US you can still buy one of these but there will be additonal shipping charges applied upon shipment.

Fred's Website link: https://hexbus.com/ti99geek/

Instructions for assembly and adding to rs232 card are here https://hexbus.com/ti99geek/Projects/ti99hdx/ti99h...