Int 10H [MCGA] [VGA] Function 12H (18) Subfunction 32H (50) Enable/disable video

Enables or disables CPU access to the video adapter's I/O ports and video refresh buffer.

Call with:

AH = 12H

AL = 00H to enable access

01H to disable access

BL = 32H

Returns:

If function supported

AL = 12H