2 interlace modes are available:
[[File:CRTC Interlace modes.png]]
* In interlace sync mode, the same information is painted in both fields to enhance readability
* In interlace sync and video mode, alternating lines are displayed in the even and odd field to double the resolution
[[File:CRTC Interlace modes.png]]
=== UM6845R and R31 ===