Data bus bit D10 is shorted to power on the RAM.
This is the chip nearest the cpld.
TF536 no RAM detected
Moderators: terriblefire, Terriblefire Moderator
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Re: TF536 no RAM detected
———
"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."
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Re: TF536 no RAM detected
ok, i will check this...
On the 2nd board everything gets retained, but Autoconfig dont see the board...
On the 2nd board everything gets retained, but Autoconfig dont see the board...
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Re: TF536 no RAM detected
Autoconfig doesnt "see" anything. Autoconfig is just a little rom that the OS reads to understand that there is memory. The memory is always here. Do you get the colour bars?ninjafahrer wrote: ↑Tue Jan 26, 2021 4:12 pm ok, i will check this...
On the 2nd board everything gets retained, but Autoconfig dont see the board...
Anyways lets do these boards one at a time or it will get confusing fast... see above i posted a picture of which pins to check.
———
"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: TF536 no RAM detected
May I also suggest checking all the connections with a microscope... these boards are farily simple and it should be easy to spot any shorts or missoldered pins, but you do need a microscope.
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Re: TF536 no RAM detected
Board 1 MEMORY -> SOLVED!
Great! Thanks for your help...!!!
on Board 2 - please explain what do you mean with colour bars?
Great! Thanks for your help...!!!
on Board 2 - please explain what do you mean with colour bars?
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Re: TF536 no RAM detected
When you boot kickstart. Do you see the colour bars. Your first board will do this if its working.ninjafahrer wrote: ↑Tue Jan 26, 2021 4:28 pm on Board 2 - please explain what do you mean with colour bars?
———
"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."
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- Posts: 29
- Joined: Fri Jul 17, 2020 2:20 pm
Re: TF536 no RAM detected
no, there is no colour bar shown at card 2.
card 1 is working now
card 1 is working now
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Re: TF536 no RAM detected
Either AS or DS is not connected correctly..
Go to address 0x00f00000 in the memory editor and see what you get there..
———
"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."
-
- Posts: 29
- Joined: Fri Jul 17, 2020 2:20 pm
Re: TF536 no RAM detected
61 1A D9 1A D9...
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Re: TF536 no RAM detected
So if you have a look at the other board it will show
11 11 49 F9 00 DF F0 00 30 3C 7F FF 39 40 00 9A
since you are getting a repeating pattern i'm guessing the CPLD is for whatever reason not responding to any internal data requests.
———
"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."