Next list of things to work through: Scart cable - still seeing flicker and on some monitors whiteout. In addition also see slight noise scrolling up the screen. Modifying cable to improve grounding and shielding. After this may tryout other suggestions from Exxos. Keyboard / Mouse - getting key re...

You could, but it is a pain in the a** to solder those. So easier and probably cheaper to do on board. I have no problems in soldering them, many people have complained about this and are soldering them with the pins in its place and the plastic melts ,,, but you can actually pull them out and sold...

Wouldnt it be possible to re route with Male-female connectors, it feels a bit unnecessary to order one PCB for just this ?
Just a thought.

Johan

i can see all the chips have a decoupling capacitor,,, but what about BAD DMA ? is there one and where? or is it not necessary?

After cutting the trace on both sides of R920 ,,,, measure between D7 and the cut free R920 i get zero ohm, those two point must go to positive plane in pcb, so i guess no need to move the R920.

And also i noticed that the holes for the PSU is mirrored on the PCB.. Maybe you already know this..

Almost done with mine some connectors and the develish resistors in RGB and some touch up and overlook of all the solderings
I solved the keyboard connector

exxos wrote: ↑Fri Aug 17, 2018 5:06 pm Small change, the 2.2K resistors packs will be 4.7K.

There is a 20uF cap in the reset circuit, but will supply a 10uF one (makes no odds to anything).

The Resistor SILs are they Isolated Resistors or Bussed Resistors or even Dual Terminator Packs

/Johan Hansson

Im up for one board...