While you can use an old Windows laptop, the most popular modern approach is using a Raspberry Pi or an old Netbook .
(and Tech 1A) was a physical, handheld hardware scan tool used by General Motors dealerships from 1983 until the mid-1990s to diagnose OBD1 vehicles.
The (and its successor, the Tech 1A) was the definitive factory diagnostic tool for General Motors vehicles from the early 1980s through the mid-1990s. For owners of classic Corvettes, Camaros, and other GM "Youngtimers," it remains a holy grail for deep-system troubleshooting.
To get a DIY emulator setup running, you generally follow these steps: How to Install the Tech2Win Diagnostic Software