Reply 422 of 457, by reenigne
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Sorry to comment on an old thread. I was doing some research recently on CGA, the 6845 CRTC and composite colour in order to improve the PC emulations in MESS - I posted a big page about it at http://www.reenigne.org/crtc.html . JAL pointed me to this conversation and I thought I should mention it here. In particular, there is some information there about how the (original) CGA card generates colours for the composite output which could be used to improve the composite emulation in DOSbox even further, so that it works correctly in modes other than 640x200 with colour 15 in the port 0x3d9 register (not that there is any software I know of that takes advantage of any other composite colour palettes available).