Commodore 128DCR c0pperdragon + RGBtoHDMI 

The RGBtoHDMI can do that for you, if you get the one with the DB9 input - that's what I use on my C128DCR. They're available here (if you can find a Pi Zero to connect it to): www.sellmyretro.com/offer/details/rgbtohdmi-for-ibm-pc-mda%2C-cga%2C-ega%2Colivetti-prodest-pc1and-commodore-c128-62028

I worked with the guy who made it to get it to handle all the modes in VDC Mode Mania (v1.1, I think it was), so it handles those. I think there is an updated VDC modes demo that might have additional modes I’ve not checked, yet. You can add profiles for additional modes, although it will involve editing the files on the SD card with timings. Once you have the new mode, you can adjust the area and scaling settings in the onscreen menus.

These old, specialist chips are worrying as there's no new replacement. I don't want to talk it up, but my Electron has been rock solid, even with all the shenanigans in my other videos going on (PiTubeDirect, Plus 1, AP6, ElkSD Plus 1, ATI+ABR, RGBtoHDMI, BBC2DVI, etc.). At least with the Electron, Dave Hitchins and Stardot are a good place to start!

I don't think so - it does get rid of the jail bars but the output is YPbPr (3-connector analogue component) rather than any of the signals an old Commodore analogue monitor would accept: RGB or S-Video (or composite). You might be able to find a CRT that takes component input but I think it's likely to be something like a broadcast video monitor, but mostly component on consumer devices came in around plasma screens. Without the RGBtoHDMI, though, you would be able to connect the component output up to something like an LCD TV with a suitable input. I was thinking of doing a separate video about the differences between the standards, using my oscilloscope as a sort of follow-up the video about the BBC Micro video output, as that's fairly interesting (if you like that sort of thing!).

@@lsbyte Thank you for explanation. I was under impression that c0pperdragon is outputting RGB. To mind you, different outputs are quite confusing to me so I can not wait for your next video about different video signal outputs:)

Sorry - I don't make or sell these, just get enthusiastic about them. You can get an RGBtoHDMI easiy now, though: www.sellmyretro.com/offer/details/rgbtohdmi-for-bbc-micro~~master~~compact~~electron-61482 - that will at least handle the 80 column mode: you just need a different cable (speak to the guy who sells them).

Actually three. ;) This is partly caused by the location of the TTL input connector (the 'hidden' one, directly on the RGBtoHDMI), the need to swap the analogue board on and off and reprogramming the CPLD. Bit of a complex history... Originally I got one for my BBC that works with the TTL level input but can also work with the analogue board (with the BBC CPLD firmware). I bought the analogue board really for flexibility and because it made it easier to change the cable. I then bought another for the Commodore 128's 80-column output with just the RGBtoHDMI and a cable with a DB9 connector (the one you can see being plugged in in the video). Whilst that uses the same board, it needs the RGB CPLD firmware and you have to remove the RGBtoHDMI HAT to change the cable. So swapping one between the BBC and the C128 would be annoying. Once I'd got the C128 c0pperdragon board in, I was swapping my BBC one between that and the C128: since that had the analogue board (and the BBC works with that), I just had to swap the firmware between the BBC and YUV versions and change the cable (the analogue board has a connector that is external, so this doesn't involve opening up the RGBtoHDMI). That was OK but a bit of a hassle. In the last week, someone was selling a spare RGBtoHDMI (only) on stardot.org.uk (the BBC forum) and I managed to get that. That meant I can now use that on the BBC (with an internally-connected TTL cable) and save the original one with the analogue board for the C128 40-column, with the YUV CPLD firmware. This also means I can easily swap that onto the ZX81 just by changing the cable and the profile, since that uses the analogue board and YUV firmware. So, yes, I do have two (well, three) and can run the C128 40- and 80-columns at the same time, through two separate RGBtoHDMIs. You could swap one between the two outputs but it's going to be a lot of faff, swapping boards on and off, updating the firmware and changing cables. It's like bicycles or kayaks: the correct number to own is one more than what you already have!

They're not on general sale, unfortunately - there was a guy in the UK selling them, and someone in the US was, too, but I think he's stopped / run out. All the details you need to make one are on the GitHub website (the software and the files to have a PCB made: you then just need to solder on some parts and add a case + SD card), although I don't know how difficult that is!

They are available now from here: www.sellmyretro.com/search/naturalSearch?keyword=rgbtohdmi - you just need to order the one with the right boards and cables (some need the analogue add-on board). You can always make up your own cables, though, to use them on different machines.

True, but my desk isn't doesn't have enough space left for one of those anymore, though! Also, I need the LCD panel for my Raspberry Pis, so this lets me use the same monitor for everything (and makes video capture really easy).