Int 67H [EMS 4.0] Function 56H (86) Subfunction 02H Get stack space for map page and call

Returns the number of bytes of stack space required by Int 67H Function 56H Subfunction 00H or 01H.

Call with:

AH = 56H

AL = 02H

Returns:

If function successful

AH = 00H

BX = stack space required (bytes)

If function unsuccessful

AH = error code