Lack of spare parts for other projects left me stumped for something to do this afternoon that didn't involve DIY. Enter the GP EP8000 Eprom programmer/emulator I've had for donkeys years that didn't work last time I plugged it in.
Easy to dismantle after unhooking the GND connection to the top metal plate and unplugging the PSU. Gaze in wonder at its green-ness, and also two suspicious-looking chips up at the top left.
Yep, the 40 pin DIPs at top left are the IMS8060N SC/MP microprocessor and its 128kx8 RAM I/O chip. NatSemi's favourite little CPU family as used in some kit-based SBCs like the SCRUMPI and Science of Cambridge MK14.
The only damage I could see was that the power LED had been crushed against the display board by miscreants unknown of the past - I'd never taken it to bits before today. Plug it in and... it works? That wasn't in the script.

But will it work when reassembled?

Yes, yes it will. Excellent. Given that this thing supports 3-rail EPROMs like the 2708 it'll be interesting to see if it will read my Nascom EPROMs. There's a serial port on the back so it should transmit to a PC running RealTerm, or unix box running minicom...