Dave Fischer Weblog

An AP101 computer, designed to fly on the space shuttle. (This particular one was a prototype from the initial testing period, and was used in the shuttle simulator.) Roughly speaking, a stripped-down IBM 360.

A ram board. This is roughly 512k, but with TONS of error correcting (for cosmic ray bit flips), and some extra tag bits.

And some early 70s era logic. For a sense of scale, those 54F175 chips in the bottom-left corner are quad flip-flops per chip, and the 54F00 chips on the third row are quad 2-input NAND gates.

Shuttle Computer