View straight down into the computer.
https://media.hachyderm.io/media_attachments/files/110/849/917/619/392/284/original/1c9739bbe00e2998.jpeg
Really fascinating construction in this early PC clone (Zenith ZF-151-52).
The whole computer is on 8-bit ISA cards, with just a small ISA backplane in the chassis (where normally a motherboard would be).
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