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?
diagrom showing 0 fastmem on new board
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Re: diagrom showing 0 fastmem on new board
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
Works a treat
Re: diagrom showing 0 fastmem on new board
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.
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.
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Re: diagrom showing 0 fastmem on new board
Did you use DiagROM to try scanning 0x200000 to 0x600000 manually?
———
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
Re: diagrom showing 0 fastmem on new board
No! That's the knowledge that I'm lacking. I will try that.
Thanks
Thanks
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Re: diagrom showing 0 fastmem on new board
It should probably show you which bank is dead.
———
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
Re: diagrom showing 0 fastmem on new board
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.
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.
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Re: diagrom showing 0 fastmem on new board
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.
Try running autoconfig.. if diagrom detects a card rom then the issue is maybe the data path rather than address path.
———
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
Re: diagrom showing 0 fastmem on new board
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.
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.
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Re: diagrom showing 0 fastmem on new board
Did you get parts from good sources?oggie wrote: ↑Mon Nov 25, 2019 12:26 am 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.
Do not trust people. They are capable of greatness.
~ Stanislaw Lem
~ Stanislaw Lem