It's a rev3.
I did install it in both boards, and it works fine in the 30MHz one:

https://photos.app.goo.gl/KpW9vDqXzvmVW9QG6

From github page:
2 0.1uF 0.1UF-25V(+80/-20%) 0603-CAP C16, C17 CAP-00810

So I should have only installed the one beside the FPU?

Mine does have an FPU in it.

Thanks for the help! So I've been testing the two board with diagrom, and one seems to be fine and passes the tests ok. It's at 33MHz. But the other doesn't seem to be very stable. It'll lock up at times, and show odd things on the screen: https://photos.app.goo.gl/AQ7kRfjaE8G51arz5 Is there a known...

OMG. Really? I thought they were 4mb!!

Call me a doofus.

I finally got back to looking at this. So I redid the solder joints, and I'm seeing 2MB of memory now. But the strange this is, I have two boards I've assemble, and both are only showing 2mb of fast ram. Is it possible my setup is unable to have more than 2mb fast? I have an a500 rev 6a modified wit...

Well, wouldn't my stock 1200 love one of these. If anyone is going to eventually be selling pcbs, I'd love to have a bare board.

No problem. I'm using this firmware:
https://github.com/terriblefire/tf534/t ... ds/tf530r3

It programmed successfully.

What lines should I check for those signals then?

Are these ram chips know to die easily? How would you even know if they were bad besides swapping them out?

I have cheap lcd scope from aliexpress which works ok . I'm saving up for a better scope. So If I'm able to get at least one memory chip soldered correct, I should have 1mb at least right? So If I can focus on the chip closest the cpld and it's finally working, I should be able to at least have 0x20...

yes. all parts are from digikey, and the board was from the link on github (dirtypcbs I think).