Changes
/* CSYNC signal */
For example, if CRTC R2=46, and CRTC HSYNC width is 14 chars then monitor hsync starts at 48 and lasts only until 51 included.
The Gate Array will always perform a full VSYNC of , outputting black for 26 lines (and including 4 lines of C-VSYNC to the monitor), even if the duration of the CRTC VSYNC is reduced to 2 µseconds.
The Gate Array uses 2 internal counters to create its CSYNC signal:
