MasterOfGizmo wrote:DrOG wrote:You're right, but I'm not familiar with FPGA programming, and there are some abandoned cores, like Apple ][ or ColecoVision, which have non-standard (reversed) sync polarity...
I just adjusted the sync polarity of the apple ][ core
But i am too stupid to use it. How does one load/run a nib image? Or has this been broken by firmware updates?
Once it's working it should be rather easy to add YPbPr support. Adding 15kHz support is a little more work as the scandoubler includes vital parts of the video circuitry and cannot just be omitted.
Now sync signal's polarity seems to be OK, but .NIB load does not work, tried it with the earlier core version from 2016 as well, bad also. It certainly worked, I remember that played Choplifter some months (a year?) ago. Perhaps some of the firmware updates broke it as you suspects.
Thanks for your effort!