One of the first home computers resurrected — Raspberry Pi and 3D printing brings faux TRS-80 to life
Joe Pasqua, reliving the days of early computing, has built a 40%-scale replica of the TRS-80 using 3D printing and a Raspberry Pi. This project is a nostalgic homage to the TRS-80 Model 3 and Model 4, capturing the essence of these classic computers. Pasqua designed the replica to feature his favorite aspects of both models, resulting in a device that cosmetically resembles the Model 4 the most.
The TRS-80, introduced in 1977 by Tandy and sold through Radio Shack stores, initially used the popular Zilog Z80 processor. Over the years, several successors followed, with the Model 4 in 1983 boasting a faster Zilog Z80A CPU and a larger display. Pasqua’s replica includes a 5-inch 640×480 display and two decorative floppy drives, complete with LEDs that flash to mimic the classic computer’s feel. The cutout for the keyboard is designed to fit an inexpensive wireless keyboard and trackpad, adding a functional touch to the retro design.
Pasqua’s project isn’t just a static model. Inside the 3D-printed case, there’s a mount for a Raspberry Pi, allowing the replica to be used as a microcomputer. Pasqua suggests that his design can accommodate a Raspberry Pi 3 Model B to the latest Raspberry Pi 5, though he personally uses a Raspberry Pi 4. This versatility ensures that the replica can keep up with modern computing needs while retaining its vintage charm.
To fully bring the TRS-80 experience to life, Pasqua uses the trs80gp emulator, enabling the Raspberry Pi to run the original TRSDOS operating system. This emulator allows the replica to function as any model of TRS-80, from the Model 1 to the later Color Computer, making the project not only a visual tribute but also a functional one. The combination of modern technology with a nostalgic design makes Pasqua’s TRS-80 replica a delightful blend of past and present.
