I managed to get hold of a Space Invaders arcade game board set.
(80-900K)

A little bit rough though…
Many chip legs has rust on them, and someone once spilled a bit cement or something similar on the board.

Bad sockets for the ROMs and CPU, so i will replace them.
I will also have to remove most of the chips and put in sockets together with new chips.
All RAMs and the CPU socket are now desoldered.
5 RAMs lost their legs during desoldering due to rust…

Next : ROM sockets, tantalums, capacitors and rusted ICs…

Big project this one.. 🙂