On this web page you may download the Wabbitemu.
A free solution for getting a TI-84 Plus on the big screen.
Click the image below to download. (This file has been scanned VirusTotal)
(Or right click, download linked file)
First, launch Wabbitemu.
Then you will see this screen.
You will need to click "Browse"
Select the ti84.rom file
And you should be seeing a TI-84 Plus on your screen