MiSTer FPGA Forum

I have a weird problem where I don't get any analogue video from some cores. I have a MisterPi with the IO board, using a DE15 to 5xBNC cable.

Specifically, I am having problems with the PCXT and Tandy CoCo 3 cores.

I have a PVM-2950QM connected, and every other core either works flawlessly, or shows a scrambled image (due to not being 15kHz, which is expected).

But for the 2 above cores, I get nothing.

Is there rhyme/reason to this? I can see comments in PCXT's source code saying "force scandouble", which I thought at first may be a clue, but I would expect that I should still see an un-synced image, as I get with, say, ao486. Also, I messed with modelines, and while these affected the output on HDMI, I still had no image on analogue.

Tandy CoCo 3 is especially strange, since CoCo 2 works just fine.

What am I missing here?

May have found my answer: viewtopic.php?p=90775#p90775

And had my suspicion confirmed by CountDuckula on Discord (Thanks!!!)

PCXT's last release certainly predates the updated framework, and CoCo3 may have just missed out too, going by the commit history.

I'll create GitHub issues if I can't nut out how to update and build them myself.

Final bump haha, I've done the update for PCXT: viewtopic.php?t=8938

However my build of CoCo3 doesn't run, I believe they had some changes to the files in sys, so will follow up there.