exxos's Atari, Amiga & retro forum

rubber_jonnie wrote: 11 Jul 2026 16:26 Hopefully won't be too long coming and I can crack on with things. Might even bring it up to CL5 and I can show off the display and also the ISA expansion board :)

Definitely would like to see this at CL5. I have the PPC640 I prefer the darker case :)

Icky wrote: 14 Jul 2026 21:48

rubber_jonnie wrote: 11 Jul 2026 16:26 Hopefully won't be too long coming and I can crack on with things. Might even bring it up to CL5 and I can show off the display and also the ISA expansion board :)

Definitely would like to see this at CL5. I have the PPC640 I prefer the darker case :)

The RGB2HDMI should be here tomorrow, so providing my cough goes away and I can stay awake more then 5 minutes I may be able to make a start on it :)

Now where did I put that spare RPi...

RGB2HDMI is here:


And I found my spare RPi.

So hopefully I can get the PPC show on the road :)

RGB2HDMI is working, so I just need to figure out the install now:


Happy days :)

So, bad day to be my RGB2HDMI, I managed to offset the hat on the RPi like this:


Which killed the CPLD dead and turned it into a miniature hot plate anytime power was applied!!!

Don't do this, it's bad for your CPLD!!!

Luckily since I am part way through a build of an RGD2HDMI for the Atom replica I built, I had a couple of spare CPLDs and stole one for this, and now it works!!!


What you can't tell here is that I had red and blue transposed, immediately obvious when I tried to run a CGA game. A little head scratching and it now works :)

So I now know the parts work, next up is pulling it all apart and installing the new display and RGB2HDMI internally, and I do at least know the wiring that I need.

It seems though that the display plastics are in need of some repair too, so that will happen at the same time.

Looking forward to getting moving with this one :)

Other than the CPLD fry up good progress!

stephen_usher wrote: 21 Jul 2026 09:07 Other than the CPLD fry up good progress!

Well, that was an accident and due to me not paying attention. I'm getting over a bout of covid, so have a cotton wool brain...

I've hooked up the actual display this morning and it looks great:


So now it's a case of dismantling, which isn't easy due to the size of the PPC512 comopared to my workbench, and then installing. I have a nice 5A PSU for the machine so it'll drive everything nicely, including the 3 ISA slot expansion and PicoMem card. The display only requires 5v, as does the RPi, so should be easy enough to pick off from somewhere inside.

I do have some plastic repairs to do tho, the left hand pivot pin needs to be glued back in place, and I think reinforced with grp. Easy enough to do with UV resin, it's great for reinforcing with small pieaces of GRP as used by nail technicians.

Something a little more complex :)


I mean the CGA colour scheme was never great but it's usable now compared to the unlit green display.

looking forward to seeing it installed in the case.

PhilC wrote: 21 Jul 2026 11:48 looking forward to seeing it installed in the case.

Me too, though the screen plastics will need to be repaired first and I'm waiting on a flat HDMI cable that should arrive tomorrow. Today is a burn in day with all the parts I'll be using.

Pretty sure it'll look great when done, and I need to get drivers sorted out for the sound card that's on the PicoMem card too.