Highest colour clock count in horizontal line
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 09 | 08 | 07 | 06 | 05 | 04 | 03 | 02 | 01 | 00 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | H8 | H7 | H6 | H5 | H4 | H3 | H2 | H1 |
Horizontal line has these many + 1 280nS increments. If the pal bit & LOLDIS are not high, long line/short line toggle will occur, and there will be this many +2 every other line. Active if VARBEAMEN=1 or DUAL+1.