search

c0pperdragon / Amiga-Digital-Video

Add a digital video port to vintage Amiga machines
299 stars 30 forks source link

Amiga Interlaced mode is off by one line #9

Closed c0pperdragon closed 4 years ago

c0pperdragon commented 4 years ago

Hi @IanSB

As previously mentioned: When using 1280x1024 output resolution, an interlaced workbench is off by one interlaced line.

capture8

This can also not be fixed by adjusting the vertical offset, because then the picture is too up. Even if it could be fixed by adjustements, I guess, the non-interlaced picture would be off instead.

For larger output resolutions this effect is basically the same, but there it is not so noticable:

capture9 capture10

IanSB commented 4 years ago

Can you try this version:

kernelrpi.zip

c0pperdragon commented 4 years ago

The Interlace mode looks like it has a balanced top and bottom overscan now with 1680x1050 output resolution. I can not switch to 1280x1024, because the single-button mode does no longer work after swapping out the kernel file. Do I have to make any changes to my setup to re-activate this feature?

IanSB commented 4 years ago

The way single button mode is selected was changed: Please update to the current release version first then replace the kernel file with the above: https://github.com/hoglet67/RGBtoHDMI/releases https://github.com/hoglet67/RGBtoHDMI/releases/download/20200916_6310e8c/RGBtoHDMI_20200916_6310e8c.zip

c0pperdragon commented 4 years ago

Interlaced display is perfect now. capture3

I have adjusted my configuration to the "Trailing -ve" sampling option in preparation for the upcomming SuperDenise-adjusted adapter board. If I got everything correct, this configuration should directly work with it as well. I have also reduced the overscan a bit because the right area was a bit narrower where the Amiga set the last two pixels to black already. Also when running my Agnus in NTSC mode, the right overscan ends with a strange jagged border. So 712 pixels is now my maximum width that should fit all purposes. Amiga.txt

IanSB commented 4 years ago

I have adjusted my configuration to the "Trailing -ve" sampling option

Yes, the above kernel has the corrected text for the sampling option.

BTW the menus are a very flickery in interlaced mode because they are only written on alternate fields.