diagrom showing 0 fastmem on new board

[oggie]

So I just finished soldering up my 2nd board and programmed the CPLDs. When I boot into diagram, it sees the 68030, but it's showing 0 for fastmem.

I double checked the solder joints and i don't see anything wrong.

Is there anything I can check?

[PaulJ_2.0]

Use a fluffy type microfibre cloth to lightly clean the ram and ram cpld. The cloth will snag on an unsoldered leg without pulling it out of shape.
Works a treat :D

[oggie]

So I tried your trick and didn't find any unsoldered legs.

I have an lcd microscope that I got from aliexpress and it works well enough to see the solder joints. I don't see any bad joints. I wonder if I have a bad board, but I'm not sure what to check to see if I have a bad one.

[terriblefire]

Did you use DiagROM to try scanning 0x200000 to 0x600000 manually?

[oggie]

No! That's the knowledge that I'm lacking. I will try that.

Thanks

[terriblefire]

It should probably show you which bank is dead.

[oggie]

https://photos.app.goo.gl/9XJWLaSjkjjgFCnC6

So I finally got around to testing this in diagrom. I think I picked the correct start/end address from the memory test.

So it looks like they're all bad? I've checked the solder joints over and over again and they look fine.

[terriblefire]

something is wrong. Either chip select lines or address lines to the RAM CPLD.

Try running autoconfig.. if diagrom detects a card rom then the issue is maybe the data path rather than address path.

[oggie]

ok. I ran autoconfig and got this : https://photos.app.goo.gl/akyREk8uXiCKHf3C8

So based on your statement, that means it's the address path? the address path from the cpld to the ram chips?

I checked continuity from the cpld to the ram chips and they all seem to be connected.

[arkadiusz.makarenko]

ok. I ran autoconfig and got this : https://photos.app.goo.gl/akyREk8uXiCKHf3C8

So based on your statement, that means it's the address path? the address path from the cpld to the ram chips?

I checked continuity from the cpld to the ram chips and they all seem to be connected.

Did you get parts from good sources?