|2||Horizontal Sync Position ||00000000||46||When to start the HSync signal.
|-
|3||Horizontal and Vertical Sync Widths||VVVVHHHH||128+14||HSync pulse width in characters (0 means 16 only on some CRTC); VSync width in scan-lines (0 always means 16. Not present on all CRTCs, fixed to 16 lines on these).
|-
|4||Vertical Total (-1)||x0000000||38||Height of the screen, in characters.