[Coco] XRoar and Color

[Allen Huffman]

> Hello,
> 
> I setup a Recalbox on a RPi for my wife for valentines day.
> I selfishly got the TRS80CoCo part of it working, of course. ;)
> I have not done a lot of CoCo emulation in the past and mostly stuck to the
> real hardware.
> I have a few games working using Xroar. Color Baseball looks great, but I
> notice some games are in black and white (i.e. Doubleback). Is that
> because it's not doing artifacting on an LCD TV screen and requires a CRT
> TV?

Possible due to those games using the PMODE4 artifact colors.  XROAR (and other emulators, I assume) has a mode to generate artifact colors, or a black and white mode to generate a pure signal. That mode is great for things that were intended to be black and white (word processors that use the hi-res screen, etc.) but makes artifact graphics look like checkerboard patterns or stripes.

		— A