On CRTCs 0/2, R1>R0 generates 1µs of border at the end of the raster line. On CRTCs 1/3/4, it does not.
=== R1 conflict Conflict of expected behaviour ===
If R1=0, there is a conflict between 2 expected behaviours of the CRTC:* activation of HBORDER when and HCC=0 , we expect HBORDER to activate as R1HCC=0* deactivation of R1 and we expect HBORDER on the condition to deactivate as HCC=0
In this situation, all CRTCs chose to do a deactivation an activation of HBORDER
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