If R1=0 and HCC=0, we expect HBORDER to activate as HCC=R1 and we also expect HBORDER to deactivate as HCC=0.
In this situation, all CRTCs chose to will do an activation of HBORDER.
If R6=0 and VCC=0, we expect VBORDER to activate as VCC=R6 and we also expect VBORDER to deactivate as HCC=0.
In this situation, all CRTCs chose to will do an activation of VBORDER. But on CRTCs 0/2, the first raster line will show an alternation of bytes of VBORDER and displayable characters.
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