8-bit acorn hardware • Re: Atom: mysterious purple bar

External display mod: Analogue RGBtoHDMI
...
I have, of course, played with the usual RGBtoHDMI menu settings to no avail but, as it works with the other Atom, that's not surprising.

Is this the generic Analog RGBtoHDMI (which is a three-board Pi Zero sized sandwich), or the much larger original Atom RGBtoHDMI, which looks like this:What sort of cable are you using?

Maybe posting a photo of the setup would help...

I've seen similar (but not identical) video glitches, and identified two possible sources:
1. Crosstalk on the Atom board itself, I think from 6847 address bus onto the 6847 video outputs (which have a very low voltage swing)
2. Crosstalk on the cable connecting the Atom PL4 to the RGBtoHDMI (see this post for more details).

Dave

Statistics: Posted by hoglet — Wed Mar 06, 2024 1:30 pm

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