Today we have an HP87XM and the first casualty of NaBloPoMo. Yep my right knee buckled and I dropped it as I was taking it out of the shed. Luckily, the damage seems to be just one crystal. So it should be an easy fix as soon as I find a replacement.
Anyway, the HP87XM was the highest development of the HP Series 80s. It had a built in screen, HP-IB bus and 128 kilobytes of RAM. As you can see from the pictures, it does not have alot of circuitry. It is indeed an overgrown calculator. Just one board for the computer and the rest for the monitor and keyboard.
I obtained this sample like many others at a University of Kentucky Surplus Auction.
Notice the unusual CRT
Good shot of the crystal I damaged.