Changes
/* CSYNC signal */
* V26 counts the number of HSYNCs occuring during a VSYNC. V26 is incremented by the Gate Array when the CRTC signals an end of HSYNC. The Gate Array activates the C-VSYNC signal when V26 reaches 2 (and if VSYNC is active on ASIC/Pre-ASIC). It deactivates this signal when V26 reaches 6. After the 26th line has been processed, the Gate Array stops outputting the palette colour black.
If a CRTC VSYNC is activated again while V26 is still in progress, then V26 is reset to 0 and starts counting up again the HSYNC pulses.
The HSYNC signal from the CRTC is 0 when inactive and 1 when active. Same for VSYNC.
