Changes
/* 6845's MA */
Setting the SSCR to zero, as at reset, (i.e. no offsets, no border), will of course effectively disable soft scroll.
==== 6845's MA ====
NOTE: It seems the 6845 has an internal "stored" MA. The current MA count is reloaded with this value at the start of each line. There are 3 times when this value is updated:
