How would I go about correcting colours in old Apogee PC games on OSSC

[willinliv]

New OSSC user here. I have a v1.8 hooked up to a Windows98 PC. All working well apart from older Apogee games such as Commander Keen, which have a red tint. I think these might be EGA games. How would I go about trying to fix the colours please? I had briefly used a 1.6 and using the RGB gains or offset I think I had improved things but on the ossc I have here now these don’t seem to have any effect. Any ideas? Thanks, Will

[marqs]

Try adjusting clamp/ALC offset.

[willinliv]

Thanks @marqs, gave that a go but just made it darker red. Comparing to a youtube video it looks like the background grey has been turned into a red colour https://www.youtube.com/watch?v=YUyQSfKRU1w&t=224s . I need to properly read the wiki but have just found that changing ALC H filter to 256 pixels brings back the grey, but then moving around in the game makes it change colour. I’ll post something onm Vogons to see if anyone else has a suggestion. Cheers

[marqs]

Did you also try setting the offset to negative?

[willinliv]

Cheers again Marqs, I hadn’t tried that. Setting Clamp/ALC-offset to -8 has fixed the colours for me and doesn not seem to effect game play or the rest of the Windows environment, so I think I can set it and leave it. Together with my usb4vc a very very nice piece of kit. Thank you!

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