Changes

CRTC

8 bytes added, 3 July

/* Overflow during Vertical Adjustment */

During vertical adjustment, if Vertical Total Adjust (R5) is changed with a value less than the current VTAC, then:

* on CRTCs 0/1/2, VTAC overflows and continues to count up to 0 to reach new R5 value

* on CRTCs 3/4, the current line is considered the last one and vertical adjustment ends

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