Tandy TRS-80 Model 4 in Chuck - Season 4, Episode 7, "Chuck Versus the First Fight" (2010)

A TRS-80 Model 4 plays the part of a Phalanx XR-12 computer on which Chuck tries to read a disc that will prove his mother's innocence.

The Phalanx XR-12 computer takes rather ridiculous triangular disks.