Changing to 43-Row Mode on the EGA

The function vid_ega43() switches the EGA between 25-row mode and 43-row mode. This function operates the same under PCDOS.

To enable 43-row mode, call:

vid_ega43(ON);

After making this call, the screen fonts and physical cursor are changed to those required for the new mode. The appropriate global variables are adjusted to set the environment for the new number of screen columns and rows (including VSROWQ). The Vermont Views global windows are resized to fit the new screen dimensions.

To return to 25-row mode, call:

vid_ega43(OFF);


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