Changes

=== Overflow during HSYNC HSC (C3l) overflow ===

During an HSYNC, if HSYNC Width (R3l) is changed with a value less than the current HSC, then HSC is overflowingoverflows and will continue to count up to its maximum value (15) before looping.  The only exception is for CRTC 1 with a value of 0, which cancels the current HSYNC. <br> === VLC (C9) overflow === If Number of Scan Lines (R9) is updated with a value less than the current VLC, then:* on CRTCs 0/1/2, VLC overflows and will count up to its maximum value (31) before looping* on CRTCs 3/4, the current line is considered the last one of this CRTC character and VLC changes to 0 on the next line

=== Overflow during Vertical Adjustment VTAC overflow ===

* on CRTCs 0/1/2, VTAC overflows and continues will continue to count up to 0 to reach new R5 its maximum value(31) before looping* on CRTC CRTCs 3/4, the current line is considered the last one of the current frame and additional management vertical adjustment ends