At my recent haul of C= stuff from Computer Station (see blog.retro-link.com/2017/01/picking-up-haul-from-computer-station.html ), I picked up three C128DCR's... all of them without the detachable keyboards. After confirming with Ray Carlsen that flat C128 keyboards would work, I'm hoping to have a friend machine (CNC) the keyboard cases. Then all I have to do is scrounge around for flat C128 keyboards to populate the new cases. Ray said that he could build the cables to attach the detachable keyboards to the DCR boxes.
Here is the list of differences that Mirkosoft has listed in his site.
Differences between C128D and C128DCR: - D was never sold in USA - CR has metal case - CR has not cooling fan, although there is a place to mount one - CR has new VDC chip 8568 instead 8563 - CR has 64kB VideoRAM for VDC instead 16kB
Here is an hacked C64 keyboard. I am a little skeptical about this solution. The C128 specific keys are missing. Although I suppose if one has a spare C64 keyboard this can be done for emergency purposes while other long term solutions are explored.
I am interested in all these options to convert composite and / or RGBI to VGA. But also I would be interested in finding out what is available as a kind of switch selector to the VGA monitor for the two signal coming in.