Alan found some pictures he took of the Neve DSP-1 console he helped build in the early 80s. The DSP1 was the first ever digital mixer, there's more about it in this post. If you look at the picture of the monitor you can see a bit how the software side of the console worked; you could define each channel's functions, and the functions of the hardware pots and buttons with total abandon, effectively creating a giant digital FX processor. Amazing!
I could previously find very few pictures of the Neve DSP on the googlenet. I scanned these myself just now from Big Al's real non-digital 30 year old photographs