I hope it is readable! I am not that good in translating someones texts on the fly :-)
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Little summary from a whole day of building the prototype:
Components in place:
A1K2_Flifi_proto2_1.jpg
Now on the table to let you view all parts:
A1K2_Flifi_proto2_3.jpg
And now something discussed in another thread called "Platinen-Thread" about Georg´s selfmade A1000 mainboard: used "peelable mask". Nice looking even on prototype.
A1K2_Flifi_proto2_2.jpg
For now Im too tired for checking all functions. Im happy that it is working in the first way of building up.
If you are looking closely, you will see that there are changes in supplying power to the circuit. Reason for that was an interfering external power supply. It was already the strongest A1200 PSU that I had... viewing the +5V on an oscilloscope made it clear: noising voltage that was disturbing the clock signal too much.
It was only while high power consuming at "start of burst" of 2ns (nano s.) but still strong enough to cause display trouble and show vertical lines right at the moment where the S-RAM burst starts. With additional filtering this trouble was gone.
Tomorrow´s scheduling is to proofe and to check how much the +5V is oscillating and how much will kick the PLL out of sync/operation. For that I prepared a fan to make enough noises to the power line. That will make new fun.
(Jens)
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