Switches the two sync counters to upward-going rather than downward, as a more likely match to the way the rest of the 6845 implementation.
Switches the two sync counters to upward-going rather than downward, as a more likely match to the way the rest of the 6845 implementation.

TomHarte/CLK,TomHarte/CLK,TomHarte/CLK,TomHarte/CLK,TomHarte/CLK