We now have reports from a few customers about these screen-dropouts. I'm trying to find what the host computers have in common - you already mentiones your board revision, but that's not enough to really compare the boards. If you can, please list the chip revisions, or even better: Take a picture of the motherboard, ideally from both sides, so we can also see if there are timing mods done on the bottom side of the board.
Please see if the "CCK pull-up" and/or "CCK capacitance" options in the "advanced" menu changes this behaviour. The current theory is that a register access is not working as it should, and access timing is counted along the CCK clock.
Finally some time to try version 1.5 of the firmware/software and to open the amiga. First thing i saw was a factory green patch wire... totally forgot i have put another (recapped) rev 1d1 board in just before the pandamic, any how. I made some images, of the IC's,
I try to make a full image of the board and other components after i have removed everything thats in the way like the rapid road.
On the rev 1d1 i had the folowing issues:
The demo JezesOnEs from LSD is guaranteed to give a lot of black screens, so very easy to reproduce!
The demo Hardwired gave an interlaced effect on the first part displaying the white big text and some blackouts.
Ruff and tumble gave a blackscreen 50% of the time just after the score count af a level.
In work bench, fast switching menus can give blackscreens (not always, hard to reproduce)
Minimizing or scrolling big application windows (also folders) gave black screens (not always, hard to reproduce)
Some times a black screen with just doing nothing on the workbench.
No matter of the setting in the advanced menu, i tried all combinations in version 1.4 and version 1.5 of the indivision software. Results stayed the same.
On the Rev 1d4:
I did the same tests but only with version 1.5 of the indi software. Till now, none of the above happend with the exception some blackscreens in the demo hardwired. but since there is also some other screencorruption i assume this is a software issue.
So it seems the combination Rev 1d1 and IndiMK3 gives the issues. Since you said that with some demo's it can be a timing issue from the software, i didnt pay any more attention to this. But since this is running perfect on my other machine,i have to assume this is not the case.
Oh, and on both boards State of the art is running perfect .