On 2015-01-09 17:17, Michał Pleban wrote: >> That's the problem. The first stage I want to do is to keep the 64 being >> a 64, meaning it can still be connected to whatever it was before, >> /plus/ those to which it couldn't over the same pins/cables. This means >> the thing has to go inside. Preferably as a "riser" for VIC and give at >> the same output lines a proper composite/s-video signal. > > As I have been conteplating such device for some time and did some very > basic research, I tell you this: there is no much reason to get it > inside as a riser for the VIC (which was what I originally wanted to do). > > The reason is that, with the newer C64's at least, you have exactly the > same signals on the video port (separated luma / chroma) as on the VIC. > There are no more signals you can extract from the VIC to make it easier > to decode video, except perhaps for the video clocks (but you can > possibly reproduce them with your own crystals). > > The only problem may be with older C64 or VIC-II where you have only > composite signal on the video port. In my approach there are a few reasons for having it as a riser inside: - I get the VIC output /before/ it gets ruined by the final amp inside the RF modulator. Contrary to what you wrote above, the signals are not the same. They are the same type, but not the same, once they passed the final amp. - It's compatible with all board revisions, even the 5-pin DIN ones. - I have all the clocks and lines I need to do the analogue patches (AEC interference cancelling and co.) before I sample the output. What I envision is not a simple "interlacer" for the VIC signal. It's an "ultimate enhancer" in the end ;-) This is not feasible in external form. -- SD! Message was sent through the cbm-hackers mailing listReceived on 2015-01-10 00:01:11
Archive generated by hypermail 2.2.0.