diagrom showing 0 fastmem on new board

[oggie]

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?

[PaulJ_2.0]

Check for shorts on both CPLD's

[oggie]

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 with 1mb chip ram.

[8 Bit Dreams]

TF530 are 2MB, so nothing wrong here.
TF534 has 4MB

[oggie]

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

Call me a doofus.

[8 Bit Dreams]

TF530 has only 2MB, thats where that all started from, Revision 1 was done exactly three years ago -December 2016, Revision 2 followed in January 2017..
Time flies...

[terriblefire]

Yup. 3 years ago today I got the 530 rev 1.

[oggie]

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 issue that it can't do 40MHz?

[chue]

My 530 runs great at 40 mhz

[chue]

It could be a multitude of things. CPU, RAM, soldering. I also remember something about one of the TF boards not being stable WITHOUT an FPU. I don't know if it's the 530 though.

I have an FPU in mine.