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.
On Gate Array, even if the duration of the CRTC VSYNC is reduced to 2 µseconds, the Gate Array will always output black for 26 lines with 4 lines of C-VSYNC to the monitor. On While on ASIC/Pre-ASIC, the CRTC VSYNC must be active for the C-VSYNC signal to be sent by the ASIC to the monitor.
The Gate Array uses 2 internal counters to create its CSYNC signal:
