I wouldn't worry too much about component recognition on boards of that vintage
.
Huge PCBs!
What are the CPU markings?
I thought a couple of the chips to the bottom left (600 thou packages) might have been SRAM but some seem to have labels which is more usual for ROM devices. Unless the labels have something else other than a revision number etc. Might be that different revisions and games had SRAM and ROM in different positions as it all looks like a bus.
The bit to the bottom right I'm guessing is for the video and sound and I guess that the two chips (ceramic and gold in one picture) are Digital to Analogue Converters (DACs).
Apart from the logic I bet some of the components are difficult to obtain now.