The Psitech HFB is a HIPPI frame buffer: a graphics display that
is connected to a supercomputer via a HIPPI interface. "Frame buffer"
implies that it is a very simple display, but that does not appear
to be true: the system consists of two large boards: one is half
occupied by ECL logic for interfacing with the HIPPI ports, and the
other half has a SPARC CPU, four PROMS, and assorted other logic.
The other board looks like a typical 90s high-end workstation
graphics board: 14 Xilinx FPGAs, lots of ram, and a DAC per RGB port.