I pulled this out of the boneyard, it’s an 80x7 bicolour (red/green) matrix display. Karl had dumped it there, but wanted it as an HSBNE sign - lucky for him that’s what I’m planning to do 
The display hardware is in good condition, and the existing controller board was easily removed, leaving a fairly straightforward 2x10 header. The columns are controlled by a chain of 20 74HC595s, and the rows by a 3-to-8 decoder, which are easy to drive.
I’m planning to run the display off an ESP8266, which will allow it to be controlled directly from the space’s WiFi. I should also be able to run it at a high enough frame rate that I can do more than just text scrollers, like piping video to it 
Controller pinout (pins numbered like an IC from the top left):
1,2,3: Row select
4: Row enable
5: Column latch
6: Column clock
7: Column data
8,9: Serial RX/TX, unused
10: IR receiver data (receiver not populated)
11-12: GND
13: dunno
14-16: GND
17-20: 5V
Column format is 8 bits red followed by 8 bits green, repeated 10 times. It’s shifted in from the right, so the first byte will end up on the left edge.
Rows are interlaced, so top-to-bottom it is 0,2,1,3,4,6,5. I haven’t found a bit order that gets closer yet (though looking at this it seems like just swapping the lowest two bits will do it, but when I tried it it just got more screwed up.)
