Debugging prototype board

Cyber · Post by **Cyber** » Fri Oct 16, 2020 1:33 pm

5 hours ago, Lorin Millsap said:

Sorry I guess I misunderstood the question then. It is a two layer board.

No problem. I also mistakenly jumped to conclusion.

Ok, it is a two layer board. One layer on each side. No inner layers. Relieved. )

BruceMcF · Post by **BruceMcF** » Fri Oct 16, 2020 2:46 pm

2 hours ago, SerErris said:

Multilayer >= 1 ?

Yes, the ambiguity is layers of WHAT ... layers of routing, or layers of board. Either one or two layers of traces/routing only need one layer of board, 3 layers of traces/routing needs two layers of board.

Stefan · Post by **Stefan** » Sat Oct 17, 2020 4:00 am

What happens if you reduce the clock speed?

Lorin Millsap · Post by **Lorin Millsap** » Sat Oct 17, 2020 4:01 am

What happens if you reduce the clock speed?

Already been tried. It doesn’t have an effect.

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StinkerB06 · Post by **StinkerB06** » Sat Oct 17, 2020 6:25 am

How's audio going? Are they planning the SAA1099 to be there, or was it dropped?

rje · Post by **rje** » Sun Oct 18, 2020 9:54 pm

Stefan> What happens if you reduce the clock speed?

Lorin> Already been tried. It doesn’t have an effect.

In a way, I think that's a good thing.

Ed Minchau · Post by **Ed Minchau** » Mon Oct 19, 2020 4:43 am

Have you considered replacing all of the decoding logic with a single small FPGA?

Cyber · Post by **Cyber** » Mon Oct 19, 2020 6:32 am

1 hour ago, Ed Minchau said:

Have you considered replacing all of the decoding logic with a single small FPGA?

It goes against one of the project goals: preferably no FPGAs or MCUs.

FPGA video chip is an exception, because capable off the shelf video chip was not found.

Lorin Millsap · Post by **Lorin Millsap** » Wed Oct 21, 2020 5:49 pm

Just some further updates. I have finished the assembly of the board along with the patches that Kevin has documented. It’s not working yet, and my schedule has been very full this week. I’ve ordered some parts I need to build a test rig, and I have a logic analyzer that I just got. So not much to report yet. But just in summary my test rig lets me get to the very basics and monitor and control many parts of the system.

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