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 On CRTC VSYNC, the Gate Array (or ASIC) will always output black for 26 lines (, including 4 lines of C-VSYNC to the monitor), . This is true 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: